A 56-year-old man presented to the emergency department with painless jaundice and weight loss. Abdominal ultrasound detected dilation of the common bile duct and the intrahepatic bile ducts. Follow-up with endoscopic retrograde cholangiography exposed a stricture of the common hepatic duct, with cholangioscopy identifying an infiltrating tumor. Biopsy revealed a granular cell tumor, which was confirmed by positive S-100 immunohistochemical staining. Surgical excision confirmed granular cell tumor of the bile duct with morphological features suggestive of malignancy.
1Division of Gastroenterology and Hepatology, Department of Medicine, Rutgers New Jersey Medical School, Newark, NJ
2Department of Pathology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
3Division of Surgical Oncology, Department of Surgery, Rutgers New Jersey Medical School, Newark, NJ
Correspondence: Patrick L. Quinn, BS, Rutgers New Jersey Medical School, 205 South Orange Ave, F-1222, Newark, NJ 07103 (firstname.lastname@example.org).
Received February 16, 2019
Accepted June 26, 2019
Online date: August 23, 2019
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