2017 Volume 31 Issue 4 Pages 745-751
Granular cell tumor of the cystic duct is a rare disease. A 58-year-old Japanese woman underwent abdominal ultrasonography at an annual general health examination and gallbladder swelling was detected. Furthermore, abdominal computed tomography (CT) indicated wall thickness of the cystic duct. She was admitted to the University of Yamanashi Hospital for evaluation of gallbladder lesion. In the physical findings at the time of admission, an egg-shaped mass (3cm diameter) was palpable at the right hypochondrium. The lesion was showed the same attenuation as the pancreatic parenchyma on unenhanced CT and a well delineated mass which enhanced progressively on dynamic contrast-enhanced CT. Cholecystectomy was performed. Histopathological examination confirmed the diagnosis of granular cell tumor without malignant features. The occurrence of granular cell tumor in the biliary tree is extremely rare, and this case is the sixth case reported in Japan.
