Radiological signs of crohn's disease:: (A) String sign of cantor, (B) Pipestem appearance, (C) Pseudo polyp, (D) Backwash ileitis
Answer is A. Ans, A. (String sign of cantor) Characteristic Radiological features of Crohn's disease or Regional Enteritis:Terminal ileum is the MC siteGranularity' & asymmetrical involvement with skip lesionUlcer: Apthous ulcer & fissure ulcerCobblestone pattern (serpiginous longitudinal + transverse ulcer separated by areas of edema)Rigidity' of mesenteric boarder and pseudosacculation of antimesenteric boarder (Omega sign)Wide gapping of bowel loops due to thickening of bowel wallStricture : long segment (string .sign if cantorDoule Halo configuration is seen on CT scan (Radiology review manual by wolfgang Dahnert 5th/809) Characteristic features of ulcerative colitisCollar button ulcerDouble Trackingflongitudinal submucosal ulceration over several centimeter)Symmetrical involvement of colonRectum involved in 95% of casesThumbprinting due to mucosal oedemBlunting of haustral fold (Pipestem appearance)Inflammatory palypBackwash ileitis: In ulcerative colitis when whole colon involved, the inflammation extends 1-2 cm into terminal ileum in 10-20% cases called Backwash ilitis .