<prompt> Double bubble sign with absent distal bowel air shadows on X-ray abdomen is characteristic ofDuodenal websDuodenal atresiaCHPSAll of the above  <response>: Ans. b Duodenal atresia Ref. Bailey and Love 26th 119Duodenal atresia may take the form of a membrane or the proximal and distal duodenum may be completely separated. Prenatal ultrasound finds a double bubble in the fetal abdo- men with polyhydramnios. There is an association with Down syndrome. Postnatally, there is bilious vomiting if the atresia is distal to the ampulla. A plain abdominal x-ray also shows the double bubble. Repair is by duodenoduodenostomy. Occasionally, there is a duodenal membrane with a modest central perforation, which may delay symptoms until later childhood. Important radiological GI signsX-RAYBa sign Diagnosis1. Single Bubble Sign2. Double Bubble Sign CHPS Duodenal atresia Ladds band Annular pancreas Malrotation of gut Preduodenal vein3. Triple Bubble Sign multiple4. Bubble Signs Jejunal or proximal ileum atresia Ileal atresia5. Riglers sign6. Football sign7. Dogs cape sign8. Falciform ligament signPneumoperitonium9. Sentinel loop sign10. Colon cut-off sign11. Renal halo sign12. Gasless abdomenAcute pancreatitis13. Seagull or Mecedes Benz sign14. Riglers triad Gall stones TriradiateGall stone ileus Pneumobilia Ectopic gallstone Small bowel obstruction15. Arc-like calcification in RUQ16. Tooth-like calcification in pelvis Liver hydatid cystOvarian dermoid17. Distorted fundic bubble18. Fracture 9-11 ribs19. Loss of splenic outline20 Elevation of left hemidiaphragmSplenic trauma21. Multiple air-fluid levels with stepladder pattern22. String of beads sign pathognomonicSmall bowel obstruction23. Liver overlap signFlank overlap signDIO overlap signCoffee-bean signInverted UV signOmega signBent inner tube signSigmoid volvulus24. Carmans meniscus signCa stomach malignant ulcer25. Hamptons lineBenign gastric ulcer26 Rams horn stomach Pseudo-Billroth appearanceCrohns disease WB 09SuperSp 1127. String signCHPS28. String sign of KantorCrohns disease29. Inverted umbrella signSterling signPulled upcontracted caecumString signIleaocaecal Tb30. Segmentation and flocculation of BariumDiffuse non-specific SB dilatationJejunization of ileumMoulage sign Loss of mucosal detailsBarium features of Malabsorption31. Saw-tooth apperance Diverticulosis32. Thumb print sign Ischemic colitis33. Claw sign andCoiled spring signIntussusception34. Hat sign Colonic polyp35. Apple core appearance Ca colon36. Mucosal granularity earliest signLoss of haustrationsUlcersPseudoploypsLead pipe or pipe stem colonUlcerative Colitis UC37. Angiodysplasia of Colon38. Solitary Rectal Ulcer39. Colitis cystic profundaGenerally Ba Studies reveal no abnormality 