500 Most common things

Most common Bank!! 1.Most common aortic branch involved in Takayasu arteritis : Left subclavian 2.Most common cause of respiratory distress in newborn : Transient tachypnea of the newborn 3.Most common location to see Asbestosis sequale : Posterior lower lobes 4.Most common karyotype / chromosomal abnormality in USA : Down’s syndrome 5. Most common osseous lymphoma, primary and secondary : Diffuse large B-cell lymphoma 6. Most common primary malignant orbital tumor in childhood : Rhabdomyosarcoma 7. Most common type of fluid collection in scrotum : Hydrocele 8. Most common type of liposarcoma to affect children : Myxoid liposarcoma 9. Most common abdominal emergency of early childhood : Intussusception. 10. Most common acetabular fracture : Posterior acetabulum. 11. Most common affected bowel segment in TB : Ileocecal area. 12. Most common affected joint in gout : First MTP. 13. Most common AIDS-related neoplasm : Kaposi Sarcoma 14. Most common allergic aspergillosis syndrome : Allergic bronchopulmonary aspergillosis. 15. Most common anatomic variant of pancreas : Pancreas divisum 16. Most common anomalous course of RCA : Interarterial 17. Most common appearance of Legionella at the peak of the disease : Bilateral airspace consolidation. 18. Most common assoc. w/ Fx of great toe distal phalanx with physeal involvement :Osteomyelitis. 19. Most common associated anomaly with coarctation : Bicuspid valve. 20. Most common association of PAPVR : Sinus venosus type ASD. 21. Most common association with small left colon syndrome : Maternal DM 22. Most common bacterial cause of mesenteric adenitis : Yersinia enterocolitica. 23. Most common benign cardiac rhythm abnormality : PAC 24. Most common benign cartilage-containing tumor : Osteochondroma 25. Most common benign growth of the skeleton : Osteochondroma 26. Most common benign hepatic lesion : Hemangioma 27. Most common benign hepatic tumor during fist 6 mo. of life : Infantile Hemangioendothelioma 28. Most common benign intraconal tumor of the orbit in adults : Cavernous hemangiomas. 29. Most common benign masses caused by asbestos exposure : Atelectatic Asbestos Pseudotumor 30. Most common benign mesenchymal tumor of kidney : AML 31. Most common benign mucosal tumor of the esophagus : Papilloma 32. Most common benign nasopharyngeal tumor : Juvenile angiofibroma. 33. Most common benign orbital tumor in childhood : Dermoid Cyst of Orbit 34. Most common benign ovarian neoplasm in young and middle-aged women ( 35. Most common benign radiation-induced tumor of the musculoskeletal system : Osteochondroma 36. Most common benign rib lesion in an adult : Fibrous dysplasia. 37. Most common benign soft-tissue tumor of the foot : Plantar fibromatosis 38. Most common benign soft-tissue tumor of vascular origin : Hemangioma 39. Most common benign solid tumor in women of childbearing age : Fibroadenoma 40. Most common benign testicular mass : Simple cyst 41. Most common benign tumor of spleen : Hemangioma 42. Most common benign tumor of the larynx : Squamous papilloma 43. Most common benign tumor of the lung : Hamartoma 44. Most common benign tumor of the small bowel : GIST 45. Most common benign vascular gastric tumor : Glomus tumor of stomach. 46. Most common bilateral testicular tumor : Lymphoma 47. Most common biliary complication s/p lap. cholecystectomy : Bile duct leak from cystic duct stump. 48. Most common biliary complication s/p liver transplantation : Obstruction/stenosis at anastomosis. 49. Most common bladder neoplasm in children younger than 10 years : Rhabdomyosarcoma 50. Most common bone to develop an osteochondroma : Femur (tibia second most common) 51. Most common brain anomaly on prenatal sonograms : Isolated Mild Ventriculomegaly 52. Most common breast tumor under age 25 years : Fibroadenoma 53. Most common cardiac manifestation of Systemic Lupus Erythematous : Pericarditis 54. Most common cardiac tumor in children : Rhabdomyoma. 55. Most common cardiac valvular tumor : Papillary fibroelastoma 56. Most common carpal dislocation : Transscaphoid perilunate dislocation. 57. Most common causative organism of acute pyogenic meningitis in adults : Strep. pneumoniae 58. Most common causative organism of neonatal pyogenic meningitis : E. coli 59. Most common cause for failure of dialysis graft : Fibrointimal hyperplasia : venous outflow stenosis. 60. Most common cause for late failure in lung transplant patient : Bronchiolitis obliterans 61. Most common cause for pulmonary edema : Left-sided heart disease 62. Most common cause non iatrogenic cause of small bowel obstruction : Hernia 63. Most common cause of a large choroid plexus cyst : Trisomy 18. 64. Most common cause of a large pleural fluid collection in the newborn period : Chylothorax 65. Most common cause of acute renal failure in children requiring dialysis : HUS 66. Most common cause of acute testicular pain in postpubertal male : Acute epididymitis 67. Most common cause of acute testicular pain in prepubertal male : Torsion 68. Most common cause of AIDS cholangiopathy : Cryptosporidium 69. Most common cause of an echogenic renal mass in a 3-month- old : Mesoblastic nephroma. 70. Most common cause of an intraorbital mass lesion in adult : Pseudotumor of Orbit 71. Most common cause of AS in Western world : Degenerative disease 72. Most common cause of bilateral breast edema : CHF. 73. Most common cause of bilateral echogenic renal cortex : Chronic glomerulonephritis. 74. Most common cause of biliary obstruction : Choledocholithiasis 75. Most common cause of bleeding between menstrual cycles : Endometrial hyperplasia. 76. Most common cause of bronchopneumonia : Staphylococcal 77. Most common cause of cancer deaths in males and females : Bronchogenic Carcinoma 78. Most common cause of cause of infectious esophagitis : Candida Esophagitis 79. Most common cause of cavitary (necrotic) pneumonia in a child : Strep pneum. 80. Most common cause of Charcot joints : Diabetes mellitus 81. Most common cause of CHF in a child : ALCAPA / aberrant left coronary artery 82. Most common cause of CHF in a neonate : Hypoplastic Left Heart. 83. Most common cause of chronic hydronephrosis in renal transplant : UV anastomosis stricture. 84. Most common cause of colonic obstruction in adults : Malignancy 85. Most common cause of colonic obstruction in the infant : Meconium plug syndrome in CF patients 86. Most common cause of colovesical fistula : Diverticulitis 87. Most common cause of congenital CNS infection : CMV. 88. Most common cause of congenital duodenal obstruction : Duodenal atresia. 89. Most common cause of congenital sensorineural hearing loss : Giant vestibular aqueduct syndrome 90. Most common cause of cord ischemia : Thromboembolic disease 91. Most common cause of coronary artery aneurysm in USA : Atherosclerosis 92. Most common cause of coronary artery aneurysm Worldwide : Kawasaki 93. Most common cause of cyanosis in a child : Tetralogy of Fallot 94. Most common cause of cyanosis n newborn Transposition of great vessels 95. Most common cause of death in a severe pelvic fracture : Hemorrhage. 96. Most common cause of death in Ataxia –Telangiectasia : Respiratory failure. 97. Most common cause of death in Jeune syndrome : Respiratory failure 98. Most common cause of drop mets : Medulloblastoma 99. Most common cause of dwarfism : Achondroplasia 100. Most common cause of echogenic renal pyramids in children : Furosemide 101. Most common cause of ejaculatory duct obstruction : Mullerian duct cyst ? 102. Most common cause of endometriosis in girls Obstructive müllerian duct anomalies 103. Most common cause of end-stage renal disease : Diabetic Nephropathy 104. Most common cause of epididymitis in males aged 15 to 35 years : Sexually transmitted diseases 105. Most common cause of esophageal rupture : Iatrogenic 106. Most common cause of exocrine pancreatic insufficiency in patients 107. Most common cause of facial hemipalsy : Bell palsy 108. Most common cause of false-positive V/Q scan for acute PE : Previous pulmonary embolism 109. Most common cause of fungal infection in AIDS patients : Cryptococcosis 110. Most common cause of gastrocolic fistula : Gastric ulcer. 111. Most common cause of heart failure in patients with COPD : Atherosclerotic heart disease 112. Most common cause of hemifacial spasticity is vertebrobasilar dolichoectasia. 113. Most common cause of hepatic calcifications : Infection 114. Most common cause of hydronephrosis in the newborn male : Ureteropelvic junction 115. Most common cause of hyperreflexive bladder : Spinal cord trauma 116. Most common cause of increased nuchal thickness : Downs syndrome 117. Most common cause of interstitial and airspace edema : CHF 118. Most common cause of intradiaphragmatic cyst :Extralobar sequestration 119. Most common cause of intraventricular hemorrhage :Disruption of the subependymal veins 120. Most common cause of intussusception in children >6 years : Lymphoma 121. Most common cause of large spherical pancreatic calcifications in children : Hereditary pancreatitis 122. Most common cause of left atrial dilatation : Mitral regurgitation. 123. Most common cause of leukokoria : Retinoblastoma. 124. Most common cause of liver metastasis : Colon. 125. Most common cause of lower extremity venous valve dysfunction : DVT. 126. Most common cause of lower GI bleeding : Diverticulosis. 127. Most common cause of malignancy of men in the world — Bronchogenic Carcinoma 128. Most common cause of maternal peripartum death : Amniotic fluid embolism 129. Most common cause of membranous croup : Staph. Aureus. 130. Most common cause of microcolon: Meconium ileus. 131. Most common cause of mortality in ulcerative colitis : Toxic megacolon . 132. Most common cause of necrolytic migrating erythema : Glucagonoma 133. Most common cause of neonatal nasal obstruction : Choanal atresia. 134. Most common cause of Neonatal Pneumonia : Group B streptococcus. 135. Most common cause of neonatal respiratory distress in full term/postmature infants – Meconium aspiration 136. Most common cause of nephrocalcinosis in adults : Primary hyperparathyroidism 137. Most common cause of non-immune hydrops in USA : Cardiac anomaly 138. Most common cause of optic nerve enlargement : Optic nerve glioma 139. Most common cause of orbital calcifications : Retinoblastoma 140. Most common cause of orbital infection : Paranasal sinusitis 141. Most common cause of osteoblastic bone metastases in an adult female : Breast cancer 142. Most common cause of osteoblastic bone metastases in an adult male : Prostate cancer 143. Most common cause of osteolytic bone metastases in a child : Neuroblastoma 144. Most common cause of osteolytic bone metastases in an adult female : Breast cancer 145. Most common cause of osteolytic bone metastases in an adult male : Lung cancer 146. Most common cause of Osteomyelitis of spine : Penetrating direct trauma 147. Most common cause of pancreatic lipomatosis in children : CF 148. Most common cause of pleural eosinophilia : Air in the pleural space 149. Most common cause of pneumoperitoneum : Ruptured duodenal ulcer. 150. Most common cause of postpartum fever : Endometritis. 151. Most common cause of pseudomyxoma peritonei : Appendiceal mucinous adenocarcinoma 152. Most common cause of pseudoureterocele : Bladder tumor 153. Most common cause of pulmonary hypoplasia : Diaphragmatic hernia 154. Most common cause of pulmonary tumor embolus : Gastric carcinoma 155. Most common cause of recurrent hip disloc. s/p hip arthroplasty : Acetabular component malposition 156. Most common cause of reflux in child w/ non-duplicated collecting system: Short intramural ureter. 157. Most common cause of renal vein thrombosis in adults : Nephrotic syndrome 158. Most common cause of restrictive cardiomyopathy : Amyloid 159. Most common cause of round pneumonia in children : Streptococcus. 160. Most common cause of round pneumonia in children : Streptococcus 161. Most common cause of small bowel obstruction : Adhesions 162. Most common cause of squamous cell ca. in the renal pelvis : Chronic Infected stag horn calculus 163. Most common cause of stridor in neonate and young infant : Laryngomalacia 164. Most common cause of sudden cardiac death among young people Hypertrophic cardiomyopathy (HCM) 165. Most common cause of SVC syndrome : Bronchogenic carcinoma 166. Most common cause of testicular swelling : Hydrocele 167. Most common cause of the pulmonary-renal syndrome : Microscopic polyangitis. 168. Most common cause of the stripe sign on V/Q scan : COPD 169. Most common cause of thoracic outlet syndrome : Scalene anticus. 170. Most common cause of toxic mega colon : Pseudomembranous colitis. 171. Most common cause of tree in bud appearance on CT : Bronchiolitis 172. Most common cause of tricuspid stenosis : Rheumatic heart disease 173. Most common cause of unilateral diaphragmatic paralysis : Malignant invasion 174. Most common cause of unilateral nonperfused lung on V/Q scan : Bronchogenic carcinoma 175. Most common cause of unilateral pulmonary edema : Prolonged unilateral dependent positioning 176. Most common cause of urinary obstruction in boys : posterior urethral valves 177. Most common cause of valvular heart disease in the United States : Degenerative 178. Most common cause of vascular ring : Double arch. 179. Most common cause of vertebra plana in children : EG 180. Most common cause requiring bronchial artery embolization : CF 181. Most common cause worldwide for cholangiocarcinoma : Clonorchis sinensis infestation 182. Most common cerebellar neoplasm in children : Medulloblastoma 183. Most common cerebral mass lesion in AIDS : Toxoplasmosis 184. Most common chest radiograph finding seen in pts with an acute PE : Atelectasis 185. Most common chest x-ray abnormality in the ICU : Atelectasis 186. Most common child abuse facture : Diaphyseal fracture, 187. Most common collagen disorder for a pleural effusion : SLE 188. Most common colonic polyp : Hyperplastic polyp 189. Most common colonic site for lymphoma : Cecum 190. Most common complication of ERCP : Pancreatitis 191. Most common complication of popliteal artery aneurysm : Distal ischemia (thrombosis/embolism) 192. Most common complication with IVC filters : DVT. 193. Most common component of mixed germ cell tumors : Embryonal Cell Carcinoma 194. Most common congenital abnormality of GI tract : Meckel’s diverticulum 195. Most common congenital anomaly of CNS in live births : Myelomeningocele 196. Most common congenital defect of CNS : Anencephaly. 197. Most common congenital head and neck cyst in a child : Thornwaldt cyst 198. Most common congenital heart disease : Bicuspid aortic valve. 199. Most common congenital intracranial tumor : Epidermoid or inclusion cyst 200. Most common congenital lesion of bile ducts : Choledochal Cyst 201. Most common congenital skeletal dysplasia : Achondroplasia. 202. Most common congenital solid tumor in the newborn : Sacrococcygeal Teratoma (1:40K live births) 203. Most common cranial nerve affected by a pituitary macroadenoma : CN VI. 204. Most common cranial nerve to be affected with schwannoma : VIII 205. Most common craniofacial malformation : Facial Clefting 206. Most common crystalline arthropathy : CPPD 207. Most common CT finding in bowel ischemia : Bowel wall thickening. 208. Most common cyanotic congenital heart malformation beyond neonatal period : TOF 209. Most common cyst of the jaw : Radicular cyst = Periapical cyst 210. Most common cystic lesion of prostate : Cystic degeneration of BPH 211. Most common cystic tumor of pancreas : Mucinous cystic neoplasm 212. Most common diffuse breast disorder : Fibrocystic disease of breast. 213. Most common diffuse gray matter degenerative disease : Alzheimer’s 214. Most common dislocated auditory ossicle longitudinal temporal bone fracture : Incus 215. Most common dislocation in adult : Glenohumeral. 216. Most common dislocation in child : Elbow. 217. Most common epididymal neoplasm : Adenomatoid tumor 218. Most common estrogenic ovarian tumor : Granulosa Cell Tumor 219. Most common etiology for chronic temporal lobe epilepsy : Ganglioglioma 220. Most common etiology for multiple small gastric polyps : Hyperplastic polyps. 221. Most common etiology for osteomyelitis : Staphylococcus aureus. 222. Most common etiology of bilaterally enlarged, hyperechoic kidneys in newborn infant : ARPKD. 223. Most common etiology of mesenteric adenitis : Viral 224. Most common etiology of pneumomediastinum : Alveolar rupture. 225. Most common etiology of rickets : Vitamin D deficiency. 226. Most common extra-adrenal site of pheochromocytoma : Organ of Zuckerkandl. 227. Most common extraaxial neoplasm of CNS : Meningioma 228. Most common extragonadal site of primary germ cell tumors : Anterior mediastinum. 229. Most common extrapulmonary site of tuberculosis : Urinary tract 230. Most common fetal cardiac anomaly seen on 4 chamber view US : AV canal defect (aka ECD) 231. Most common fibromatosis in childhood : Infantile Myofibromatosis 232. Most common finding of a tubal pregnancy seen on US images Adnexal mass separate from ovary 233. Most common finding of contralateral kidney in MCKD : Reflux 234. Most common fluid collection seen in transplant patients : Lymphoceles. 235. Most common form of aortic stenosis : Valvular 236. Most common form of carpal instability : DISI 237. Most common form of emphysema in alpha-1 antitrypsin deficiency : Panlobular emphysema 238. Most common form of emphysema in nonsmokers : Panlobular emphysema 239. Most common form of emphysema in smokers : Centrilobular emphysema 240. Most common form of hypertrophic cardiomyopathy : Asymmetric involvement of the interventricular septum 241. Most common form of skeletal dysplasia : Acquired skeletal dysplasia. 242. Most common form of systemic vasculitis in adults : Giant cell (temporal) arteritis 243. Most common fracture of forearm : Colles 244. Most common functional tumors of the ovary : Sex cord–stromal tumors 245. Most common fungal infection in AIDS : Cryptococcus. 246. Most common genitourinary organ affected by neurofibromas : Urinary bladder 247. Most common germ cell tumor associated with excessive hCG production :Choriocarcinoma. 248. Most common germ cell tumor associated with excessive hCG production after choriocarcinoma : Dysgerminoma. 249. Most common GI neoplasm : Adenoma 250. Most common GI tract location for primary extranodal lymphoma : Stomach, usually NHL type. 251. Most common glial tumor in adults : Ependymoma 252. Most common glial tumor in NF 1 : JPA. 253. Most common glial tumor with microcalcifications : Oligodendroglioma 254. Most common gynecologic neoplasm : Uterine Leiomyoma 255. Most common hereditary hypercoagulable condition : Factor V Leiden 256. Most common hereditary leukodystrophy : Metachromatic leukodystrophy 257. Most common histologic type of bronchogenic carcinoma associated with cavitation : Squamous 258. Most common histologic type of bronchogenic carcinoma associated with pancoast tumor : Squamous 259. Most common histologic type of bronchogenic carcinoma associated with pleural effusion : Adenocarcinoma 260. Most common histologic type of lung cancer associated with asbestosis exposure : BAC 261. Most common histologic type of primary cutaneous lymphoma :T- cell lymphoma 262. Most common ILD to be found in association with collagen vascular disease : NSIP 263. Most common indication for percutaneous vertebroplasty : Osteoporosis. 264. Most common infection to cause cerebellar hypoplasia & migration anomalies : CMV 265. Most common infratentorial neoplasm in an adult : Metastases 266. Most common inherited disease among Caucasian Americans : CF 267. Most common internal enhancement pattern in DCIS with non mass like enhancement : Clumped enhancement 268. Most common intracranial for site of teratomas : Pineal region. 269. Most common intracranial presentation of TB : Tuberculous meningitis. 270. Most common intramedullary spinal neoplasm in adults : Ependymoma of Spinal Cord 271. Most common intramedullary tumor in children : Astrocytoma 272. Most common intramedullary tumor of adults : Ependymoma. 273. Most common intraocular neoplasm in childhood : Retinoblastoma 274. Most common intraorbital tumors found in adults : Cavernous hemangiomas. 275. Most common intrathoracic fetal anomaly : Congenital diaphragmatic Hernia 276. Most common intrathoracic foregut cyst : Bronchogenic Cyst 277. Most common intrauterine CNS infection : CMV 278. Most common intravascular venous tumor : Leiomyosarcoma of IVC 279. Most common in-utero renal tumor : Mesoblastic nephroma. 280. Most common invasive gynecologic malignancy : Endometrial malignancy 281. Most common islet cell tumor in MEN 1 : Gastrinoma 282. Most common islet cell tumor of the pancreas : Insulinoma. 283. Most common joint involved in synovial osteochondromatosis : Knee 284. Most common lesion to cause expansion of paranasal sinus : Mucocele 285. Most common lethal bone dysplasia : Osteogenesis imperfecta type II ? 286. Most common liver tumor after metastases : Hemangioma 287. Most common lobe affected in bronchial atresia : Left upper lobe. 288. Most common location for a cephalhematoma : Parietal 289. Most common location for a gastric diverticulum : Posterior wall of the gastric fundus. 290. Most common location for a pilocytic astrocytoma : Cerebellum 291. Most common location for a solitary myeloma of the bone : Thoracolumbar spine 292. Most common location for a synovial sarcoma : Knee 293. Most common location for a Tarlov cyst : Posterior rootlets of S2 + S3 294. Most common location for abdominal sarcoid involvement : Stomach 295. Most common location for atelectatic asbestos pseudotumor : Posteromedial & -lateral basal region of lower lobes 296. Most common location for chordomas : Sacral spine. 297. Most common location for gallbladder perforation : Fundus 298. Most common location for Sclerosing Osteomyelitis of Garré (sterile Osteomyelitis) : Mandible 299. Most common location for typhlitis : Cecum. 300. Most common location for well-differentiated liposarcoma : Thigh 301. Most common location in biliary tree for cholangiocarcinoma : Upper third/perihilar region. 302. Most common location in the spine for an osteochondroma : Cervical (C2) followed by thoracic T8 303. Most common location of a meningioma in the spine : Thoracic spinal cord 304. Most common location of a periurethral diverticulum in a female : Posterolateral. 305. Most common location of an ectopic pregnancy : Ampullary region of the fallopian tube. 306. Most common location of benign and malignant masses in breast : Upper outer quadrant 307. Most common location of bronchogenic carcinoma : Right upper lobe 308. Most common location of coarctation : Postductal beyond the origin of the left subclavian artery. 309. Most common location of coronary calcifications : LAD. 310. Most common location of DAI : Frontotemporal gray–white matter junction. 311. Most common location of GIST : Stomach. 312. Most common location of GU obstruction in a neonatal male : Ureteropelvic junction. 313. Most common location of intracranial dissection : Vertebral arteries. 314. Most common location of intraorbital abscess : Subperiosteal space on medial wall. 315. Most common location of intraventricular meningioma : Atrium of the lateral ventricle. 316. Most common location of oligodendroglioma : Frontal lobe. 317. Most common location of pleomorphic xanthoastrocytoma : Temporal lobes. 318. Most common location of pulmonary sequestration : Posterior medial lower. 319. Most common location of PVNS : Knee. 320. Most common location of sarcoidosis in spinal cord : Cervical. 321. Most common location of the biliary embryonal Rhabdomyosarcoma : CBD 322. Most common location of triquetral fracture is dorsal avulsion 323. Most common location to find a lithopedion : Adnexae 324. Most common location to see intravertebral vacuum phenomenon (Kümmell Disease) : Thoracolumbar junction 325. Most common lung infection in HIV: Bacterial pneumonia 326. Most common lung mass : Granuloma 327. Most common lysosomal storage disorder : Gaucher’s disease 328. Most common malformation associated with callosal agenesis : Dandy-Walker malformation. 329. Most common malignancy of childhood : Leukemia. 330. Most common malignancy of parotid gland in adult : Mucoepidermoid carcinoma. 331. Most common malignant abdominal neoplasm in children 1–8 years old : Wilms Tumor. 332. Most common malignant bone tumor in children : Ewings 333. Most common malignant cause of bilateral global renal enlargement : Lymphoma. 334. Most common malignant neoplasm of diaphragm : Fibrosarcoma. 335. Most common malignant neoplasm of the spleen : Lymphoma. 336. Most common malignant ovarian neoplasm : Serous adenocarcinoma. 337. Most common malignant ovarian neoplasm : Serous cystadenocarcinoma. 338. Most common malignant primary bone tumor in young adults + children : Osteosarcoma 339. Most common malignant radiation-induced tumor of the musculoskeletal system : MFH 340. Most common malignant sex cord–stromal tumor : Granulosa cell tumor 341. Most common malignant testicular neoplasm : Nonseminomatous germ cell tumors 342. Most common malignant tumor affecting ribs of children + adolescents : Ewings Sarcoma 343. Most common malignant tumor of the abdomen in patients with NF1 Malignant peripheral nerve sheath tumor 344. Most common malignant tumor of the duodenum : Adenocarcinoma. 345. Most common malignant tumor of the heart : Angiosarcoma 346. Most common malignant tumor of the small bowel : Carcinoid 347. Most common mammographic finding in DCIS : Microcalcifications 348. Most common mammographic finding in Infiltrating/Invasive Lobular Carcinoma : Architectural distortion. 349. Most common manifestation of asbestosis exposure : Pleural plaques 350. Most common manifestation of asbestos-related pleural disease : Pleural effusion 351. Most common manifestation of blunt chest trauma : Pulmonary contusion 352. Most common mass lesion of the cerebellopontine angle after acoustic schwannoma : Meningioma 353. Most common mediastinal germ cell tumor : Seminoma. 354. Most common mediastinal mass in a child between the ages of 6 & 12 years old : Lymphoma 355. Most common mediastinal neurogenic tumor : Schwannoma 356. Most common mesenchymal origin neoplasm of GI tract : GIST 357. Most common metabolic liver disease in children : Hepatic cirrhosis in homozygous alpha-1 Antitrypsin Deficiency 358. Most common metastases to the spleen : Breast carcinoma 359. Most common metastasis to the heart : Melanoma 360. Most common metastatic cause of linitis plastica : Breast carcinoma 361. Most common metatarsal to have a stress fracture : Second metatarsal. 362. Most common missed type of breast cancer on mammography : Infiltrating/Invasive Lobular Carcinoma. 363. Most common mitral valve abnormality in the Western world : Non-rheumatic mitral valve disease. 364. Most common monodermal teratoma : Struma ovarii. 365. Most common motor neuron disease : ALS. 366. Most common MR imaging finding in DCIS : Non-masslike enhancement. 367. Most common mycotic pneumonia in an AIDS patient : Cryptococcus. 368. Most common natural outcome of the VSD : Spontaneous complete closure. 369. Most common neonatal cyanotic congenital heart malformation : TGV 370. Most common neonatal lesion of adrenal gland : Nontraumatic Adrenal Hemorrhage. 371. Most common neoplasm of conus medullaris : Myxopapillary Ependymoma of Spinal Cord. 372. Most common neoplasm of internal auditory canal / cerebellopontine angle : Vestibular Schwannoma. 373. Most common neoplasm of the gastrointestinal tract in patients with NF1: Neurofibromas. 374. Most common nerve to be involved in tarsal tunnel syndrome : Posterior tibial nerve. 375. Most common nonepidemic meningoencephalitis in immunocompetent individuals in US : Herpes Encephalitis. 376. Most common nonepithelial malignant bladder tumor : Leiomyosarcoma. 377. Most common nonepithelial tumor in the colon : Lipoma. 378. Most common nonepithelial tumor of the bladder : Leiomyoma. 379. Most common nonglial primary tumors of the central nervous system : Meningiomas. 380. Most common nonlymphoproliferative primary malignant tumor of the spine in adults : Chordoma. 381. Most common nonlymphoproliferative primary malignant tumor of the spine in children : PNET. 382. Most common nontraumatic cause of acute limp in a child : Toxic synovitis. 383. Most common non-traumatic cause of facial nerve paralysis & hearing loss : CPA tumor. 384. Most common odontogenic mass : Odontoma= odontogenic hamartomatous malformation. 385. Most common of all alimentary tract duplications : Small Bowel Duplication Cyst. 386. Most common of cerebral vascular malformation : DVA. 387. Most common opportunistic infection in AIDS : Toxoplasmosis. 388. Most common organism involved in pancreatic abscess : E. Coli. 389. Most common organism of acute pyogenic meningitis in infants & children : N. meningitides. 390. Most common origin of cystic artery : Right hepatic artery. 391. Most common osteochondrodysplasia : Hereditary Multiple Exostoses 392. Most common ovarian neoplasm : Dermoid aka dermoid cyst = Mature cystic teratoma 393. Most common ovarian tumor-related morbidity : Bowel obstruction 394. Most common pancreatic abnormality in adult pt’s with CF : Complete fatty replacement 395. Most common paraneoplastic disease associated with thymoma : Myasthenia gravis 396. Most common parasitic infection involving CNS in developing countries : Cysticercosis 397. Most common parotid disease in children : Mumps parotitis 398. Most common pattern of bronchial arteries : Two left & one right bronchial artery 399. Most common pattern of enhancement at DE MR cardiac imaging : Patchy midwall enhancement with multiple foci 400. Most common pattern of hepatic involvement of secondary lymphoma : Diffuse infiltrative 401. Most common pattern of spread in Gallbladder Carcinoma : Direct spread. 402. Most common pediatric glioma : JPA 403. Most common pediatric tumor causing isosexual precocious puberty in a girl : Granulosa cell tumor 404. Most common phakomatoses : NF1 405. Most common pineal tumor : Pineal Germinoma 406. Most common predisposing cause to develop pneumothorax during percutaneous lung biopsy : COPD 407. Most common predisposing disorder of secondary spontaneous pneumothorax : COPD 408. Most common pregnancy-related mortality in the first trimester Ectopic pregnancy 409. Most common presentation for idiopathic pulmonary fibrosis : Dyspnea 410. Most common presentation in stuck twin syndrome : Monochorionic diamniotic 411. Most common presentation of bronchoalveolar cell carcinoma (BAC) : Solitary pulmonary nodule 412. Most common presentation of GIST on cross sectional imaging : Cystic areas of necrosis. 413. Most common presentation of mesoblastic nephroma : Palpable mass at birth. 414. Most common presentation of neurocysticercosis : Seizures. 415. Most common presenting symptom of Osler Weber Rendu : Hemoptysis. 416. Most common primary benign mesenteric tumor : Desmoid. 417. Most common primary brain tumor : GBM. 418. Most common primary cardiac tumors in adults : Myxomas. 419. Most common primary cerebellar mass in an adult : Hemangioblastoma 420. Most common primary demyelinating disease : MS 421. Most common primary female urethral malignancy : Squamous cell carcinoma 422. Most common primary hepatic neoplasm in infants & children <5 years old : Hepatoblastoma 423. Most common primary intraocular neoplasm in adult Caucasian : Uveal Melanoma 424. Most common primary lung tumor under age 16 : Bronchial Adenoma 425. Most common primary malignant rib tumor : Chondrosarcoma 426. Most common primary malignant sacral tumor : Sacrococcygeal Chordoma 427. Most common primary malignant soft-tissue tumor of late adult life : Soft-tissue MFH 428. Most common primary neoplasm of the spleen : Cavernous hemangioma 429. Most common primary neoplasms of the anterior superior mediastinum Thymomas. 430. Most common primary posterior mediastinal neoplasms :Neurogenic tumors 431. Most common primary tumor of the diaphragm : Lipoma 432. Most common radiation-induced CNS tumor : Meningioma 433. Most common reason for cardiac transplantation : Dilated cardiomyopathy 434. Most common recognized CNS manifestation of VHL disease : Hemangioblastoma of CNS 435. Most common relevant finding on cavogram for IVC filter placement : Circumaortic left renal vein. 436. Most common renal fusion anomaly : Horseshoe kidney 437. Most common renal mass in a 3 months old infant : Mesoblastic nephroma 438. Most common respiratory cause of cold agglutinin production : Mycoplasma pneumonia 439. Most common retinal infection in AIDS : Toxoplasmosis 440. Most common right cardiophrenic angle mass : Epicardial fat- pad/lipoma 441. Most common segment involved in tracheobronchial injury : Right lower lobe bronchus. 442. Most common sex cord-stromal cell tumor : Ovarian Fibroma 443. Most common sign of failing dialysis graft : Increased venous pressures 444. Most common sign of tuberous sclerosis : Myoclonic seizures 445. Most common single cause of breast lumps in females between 35 to 55 years of age : Breast cyst 446. Most common site for an intracardiac papillary fibroelastoma : Aortic valve. 447. Most common site for aneurysm in the chest : Descending thoracic aorta. 448. Most common site for cardiac myxoma : Left atrium 449. Most common site for intra cardiac thrombus formation : Atrial appendage. 450. Most common site for optic melanoma metastases : Liver. 451. Most common site for penetrating aortic ulcers : Descending thoracic aorta 452. Most common site of abdominal involvement in Hodgkins disease : Spleen 453. Most common site of aortic dissection : Prox. Desc. Thoracic aorta near ductus lig. attachment 454. Most common site of biliary tract injury caused by blunt abdominal trauma : Gallbladder 455. Most common site of monostotic fibrous dysplasia : Ribs 456. Most common site of rupture of sinus of Valsalva aneurysm : RV followed by RA. 457. Most common solid extracranial tumor of childhood : Neuroblastoma 458. Most common spermatic cord tumor : Lipoma 459. Most common spinal cord segment of lymphoma of spinal cord : Cervical 460. Most common spinal cord tumor : Ependymoma 461. Most common spinal location for cord astrocytoma : Thoracic 462. Most common spinal location for cord ependymoma : Cervical 463. Most common subcortical degenerative disease : Parkinson’s 464. Most common subglottic soft-tissue upper resp. tract obstructing mass in neonates : Subglottic Hemangioma 465. Most common submucosal tumor in colon : Lipoma 466. Most common subtype of NHL involving the esophagus : Diffuse large B-cell lymphoma 467. Most common subtype of renal cell carcinoma : Clear cell adenocarcinomas 468. Most common suprasellar mass : Craniopharyngioma 469. Most common syndromic islet cell tumor : Insulinoma 470. Most common systemic allergic hypersensitivity-related acute small-vessel vasculitis in children : HSP 471. Most common systemic fungal infection in immunocompromised patients : Candidiasis Of Liver 472. Most common tarsal bone to get fractured : Calcaneus 473. Most common tarsal coalition : Talocalcaneal 474. Most common testicular tumor in a young boy : Yolk sac tumor 475. Most common tibial plateau fractures : Lateral tibial plateau (Schatzker classification type I–III) 476. Most common trigonal intraventricular mass in adulthood : Meningioma 477. Most common tumor of adenohypophysis : Pituitary Adenoma 478. Most common tumor of genitourinary tract : Metachronous TCC 479. Most common tumor of the appendix : Carcinoid 480. Most common tumor of the esophagus : Leiomyomas 481. Most common tumor of the minor salivary glands : Adenoid Cystic Carcinoma 482. Most common type of abdominal wall hernia : Inguinal hernia 483. Most common type of ASD : Ostium secundum 484. Most common type of brain hernaition : anterior / uncal transtentorial 485. Most common type of brain herniation : Subfalcine herniation 486. Most common type of C2 fractures : Type 2 487. Most common type of cancer to arise from a thyroglossal duct cyst : Papillary carcinoma 488. Most common type of cardiomyopathy : Dilated cardiomyopathy 489. Most common type of choledochal cyst : fusiform dilatation of the extrahepatic duct Type 1c 490. Most common type of congenital internal hernia : Left paraduodenal hernia 491. Most common type of encephalocele in SE Asia: Sincipital Encephalocele 492. Most common type of encephalocele in US : Occipital Encephalocele 493. Most common type of endoleak in the abdominal aorta : Type II endoleak 494. Most common type of endoleak in the thoracic aorta : Type I endoleak 495. Most common type of fracture of the proximal 5th metatarsal bone : Peroneus brevis avulsion fracture. 496. Most common type of gallbladder inflammation : Chronic cholecystitis 497. Most common type of internal hernia : Postoperative, transmesenteric hernias. 498. Most common type of intrapulmonary involvement of Hodgkins disease : Bronchovascular form. 499. Most common type of liver abscess : Pyogenic Liver Abscess 500. Most common type of lymphoma involving the head and neck region : Diffuse large B-cell lymphoma