KEY WORDS: ampullary stenosis; biliary obstruction; duodenal Crohn's disease; review.Gastroduodenal involvement in Crohn's disease (CD) is rare, with a reported incidence ranging between 0.5 and 4.0% (1-6). Since Gottlieb and Alpert (7) described the first case in 1937, CD of the duodenum is being increasingly recognized. We report an unusual case of duodenal CD involving the major ampulla resulting in biliary obstruction.
CASE REPORTA 24-year-old male was admitted for closure of a loop ileostomy. Three months earlier, he had undergone a total colectomy with an ileal pouch-anal anastomosis (IPAA) for ulcerative colitis (UC) refractory to medical therapy. UC was diagnosed in 1996 after the patient presented with bloody diarrhea. A colonoscopy shortly before the colectomy showed diffuse and continuous colitis from the rectum to the hepatic flexure. Biopsies revealed severe acute and chronic inflammation with gland branching and crypt abscesses consistent with chronic inflammatory bowel disease (IBD). No granulomas were seen. A UGI/SBFT follow-through was normal. The results of an IBD-antibody marker panel from Prometheus, Inc., San Diego, California ([+] PANCA and [−]ASC), were also suggestive of UC.Following the ileostomy closure, the patient developed sinus tachycardia and hypertension, with a heart rate in the 130s and a blood pressure of 200/100. Thyroid function tests were obtained. His thyroid stimulant hormone (TSH) was <0.01 µIU/ml (ref. range, 0.35-5.50 IU/ml) and his free thyroxine level (FT4) was 13.4 IU/ml (ref. range, 1.0-4.0 IU/ml), supporting a diagnosis Manuscript of hyperthyroidism. Therapy with methimazole and metoprolol, 25 mg po bid, was initiated. Several days after surgery, the patient developed postprandial right upper quadrant (RUQ) pain, nausea, and vomiting. Physical examination was significant for moderate RUQ tenderness without peritoneal signs. Further investigations included the following: total bilirubin, 1.6 mg/dl (ref. range, 0.3-1.2 mg/dl); serum aspartate aminotransferase, 231 U/L (ref. range, 5-40 U/L); serum alanine aminotransferase, 289 U/L (ref. range, 5-40 U/L); and alkaline phosphatase, 198 U/L (ref. range, 35-120 U/L).A RUQ ultrasound revealed a diffusely dilated common bile duct (CBD) measuring 1.3 cm in maximal diameter. The pancreatic duct also appeared prominent. The gallbladder was visualized without wall thickening, pericholecystic fluid, or gallstones. A subsequent MR cholangiopancreatogram (MRCP) confirmed the dilation of the CBD and showed a prominent pancreatic duct measuring 3-5 mm in maximum diameter. Soft tissue fullness was noted at the ampullary region, which was seen in all sequences and measured 7 × 6 mm in diameter, consistent with a prominent papilla. A small bowel through study showed an entirely normal course, caliber, and mucosal pattern.Endoscopic retrograde cholangiopancreatography (ERCP) was performed. Endoscopic views of the second and third portions of the duodenum revealed an abnormal granular appearance of the mucosa, with scattered superficial ...