[Granular cell tumor of the bile duct: an infrequent location]. / Tumor de células granulosas en la vía biliar: una localización poco frecuente.

We report a case of granular cell tumor of the cystic duct. We have found only 47 such tumors of the biliary tract reported in the literature. Main symptoms at presentation are abdominal pain or obstructive jaundice. The clinical diagnosis is often difficult and the differential diagnosis is established with other more frequent conditions, including malignant neoplasms. Surgical excision is curative.