Korean Journal of Urological Oncology  2017;15(3):187-191

doi:10.22465/kjuo.2017.15.3.187

Collecting Duct Carcinoma (Bellini Duct Carcinoma) Presented as a Renal Cyst.

Hyun Jin JUNG 1 ; Hoon Kyu OH ; Hong Seok SHIN

Affiliations

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Keywords

Renal cell carcinoma; Renal cyst; Collecting duct carcinoma; Metastasis

Country

Republic of Korea

Language

English

Abstract

Renal cysts are frequently seen in the general population. Most small simple renal cysts are managed by conservative treatment. A renal cell carcinoma (RCC) presenting as a renal cyst is extremely uncommon, and collecting duct carcinoma is a rare type of RCC. This report describes a collecting duct carcinoma initially presnted as a renal cyst. The patient was a 52-year-old man who had been diagnosed with a renal cyst in the left lower pole 8 years earlier but was not regularly follow-up. He presented with left flank pain and gross hematuria. Computed tomography revealed a heterogeneous enhanced mass in the left lower pole and multiple para-aortic lymph nodes. He underwent radical nephrectomy and lymph nodes dissection which confirmed collecting duct carcinoma with sarcomatoid differentiation.