<prompt> Thumb printing sign on barium study is a feature of-Duodenal ulcerCarcinoma stomachCarcinoma head of pancreasIschemic Colitis  <response>: Ans. is d i.e., Ischemic Colitis Ref: Emergency medicine 1ste p.66o Signs of ischemic colitis:- Thumb printing, shallow ulcers serrated mucosa, Bowel wall thickening of affected segment.Sign in gastrointestinal radiologyDiseasesSingle Bubble signCongenital hypertrophic pyloric stenosisDouble Bubble signDuodenal atresiaDuodenal webDuodenal stenosisLadds bandAnnular pancreasMalrotation of gutPreduodenal veinTriple Bubble signJejunal or proximal ileum atresiaMultiple Bubble signIleal atresiaSentine loop signColon cut-off signRenal halo signGassless abdomenAcute pancreatitisDouble contour of medial border of duodenal C loop Pad sign Antral pad signPancreatic carcinomaDilatedwidened duodenal 4C loop Mucosal irregularity Scrambled egg appearance on ERCPPancreatic carcinomaRose thorning of medial wall of 2nd part of duodenum InvertedReverse 3 sign of frostberg Double duct sign ERCP Liver overlap sign Flank overlap sign left DIO overlap sign Coffee bean signSigmoid volvulusBird-of-Preg sign Birds beak sign ace of spades appearance Inverted UV sign Omega sign Bent inner tube sign Bent tyre tube Riglers sign or double wall sign Triangle sign Cupola sign Football signPneumoperitoneiumDogs cape sign_Inverted V sign Falciform ligament sign Seagull or Mercedes Benz or Crow feet signGall stones triradiateFleischner or Inverted umbrella sign Conical cecum or Amputed cecum Goose neck deformity Purse string stenosisIleocecal tuberculosisStierlin sign String sign Widening of ileocecal angle Normal 90deg Carmans meniscus signCarcinoma stomach malignant ulcerString sign of Kantor Cobble stone appearance Rose thorn appearance Rams horn stomachCrohns diseaseBulls eye or Target lesions Comb sign Creeping fat sign on CT Mucosal granularity earliest sign Loss of haustrations Collor button ulcerUlcerative colitisPseudopolyps Lead pipe or pipe stem colon Back wash ileitis Mucosal edema thumb printing Meniscus sign Claw sign Empty right iliac fossaIntussusceptionCoiled spring sign Pincer sign Target sign Bowlers hat sign Hat signColonic polypThumb print signIschemic colitisSaw-tooth appearanceColonic diverticulosisString of bead signSmall bowel obstructionStep ladder pattern multiple air fluid levelsIntestinal obstructionAccordion patternPseudomembranous colitisDistorted fundic bubble Indentation of gastric air bubble Fracture 9-11 ribs on left side Loss of psoas outlineSplenic traumaElevation of left hemidiaphragm Multiple air fluid levels with stepladder pattern Tooth - like calcification in pelvisOvarian dermoidArc - like calcification in right upper quadrantLiver hydatid cystWidening of C loop of duodenumCarcinoma pancreatic headMC causePancreatitisLymph node enlargementRetroperitoneal massesAbdominal aortic aneurysmCholedochal cystApple core appearanceNapkin ring signCarcinoma colonSoap Bubble signBubblyFroathyApple sauce appearanceMeconium ileusCentral dot signCarolis disease most commoncause,Prebiliary cysts, obstructive jaundice, periportal lymphedema.Pruned-T ree appearance Beaded appearancePrimary sclerosing cholangitisSkip lesions Light bulb appearanceLiver hemangioma on T2 image on MRIDouble track sign String signCongenital hypertrophic pyloric stenosisShouldermushroomapple core signBeak signDiamond signTeat signCaterpillar sign Short mouth appearanceIleocecal valveLove bird signPost-traumatic diaphragmatic herniaMoulage signMalabsorption celiac diseaseHellmers signIntraperitoneal fluidRat tail appearance of esophagusEsophageal carcinomaMegaesophagus sigmoid esophagus Bird beak appearanceHurst phenomenonAchalasia cardiaYo-Yo motion of barium Corkscrew appearanceesophageal curlingRosary-beadsheikh kebab configurationChain of bead appearanceDiffuse esophageal spasm o Dog ear or bladder ear sign-Hemoperitoneum of pouch of douglaso Cluster sign on CT-Multiple abscesses of livero Straight line sign linear border between normally perfused and hypoperfused parenchyma of liver - Hepatic segmental perfusion.o Double target sign on MRI-Pyogenic liver abscesso Wheel inside wheel sign on USG-Fungal Candidal liver abscesso Meniscus sign on cholangiography-CBD stone 