Korean J Urol Oncol.  2017 Dec;15(3):187-191. 10.22465/kjuo.2017.15.3.187.

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

• Jung HJ
• Oh HK
• Shin HS

• KMID: 2402602
• DOI: http://doi.org/10.22465/kjuo.2017.15.3.187

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.

Keyword

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

MeSH Terms

Carcinoma, Renal Cell*
Flank Pain
Follow-Up Studies
Hematuria
Humans
Lymph Nodes
Middle Aged
Neoplasm Metastasis
Nephrectomy