Abstract

Introduction: Collecting duct carcinomas are seen extremely rare. In this report, a 60-year-old man, who

admitted to our clinic with hematuria, that had occurred one time in the past and left flank pain for six

months, is presented. Abdominal ultrasonography (USG), computed tomography (CT) and intravenous

pyelography (IVP) revealed a lobulated, hypoechoic, solid mass lesion, 4x8.5 cm in dimension, at the left renal

pelvis level. Left transperitoneal radical nephrectomy was performed. The histopathological diagnosis was

collecting duct carcinoma (Bellini) of papillary tubular type. Immunohistochemically, neoplastic cells had

positive immunoreactivity to cytokeratine-7 (CK-7), CEA and HMWCK. Reevaluation of the patient

demonstrated local recurrence and pulmonary metastases. Collecting duct carcinomas (CDC) are seen

extremely rare and have poor prognosis and their diagnosis are difficult.