Chromophobe Renal Cell Carcinoma (ChRCC) with Osteosarcomatous Differentiation and Osseous Pulmonary Metastasis- A Case Report
Philip Tojo Kalloopparamban, Balagopal Nair T., Tharun B. K., Sandeep R. Nath, Shwetana Palavalasa, Prakhar Saxena
Asian Journal of Research and Reports in Urology · pp. 108–112 · Published 16 Sep 2023
Abstract
Chromophobe renal cell carcinoma, a subtype of Renal Cell Carcinoma (RCC) is associated with a better prognosis than clear cell RCC and comprises about 3-5 % of all RCCs. It is believed to originate from the intercalated cells of the distal nephron (Steven C. Campbell MD, 2016). Sarcomatoid differentiation can occur with any RCC, in which high-grade spindle cells co-exist with epithelial areas of the tumor. It suggests transformation to higher grade malignancy and an ominous outcome. The sarcomatoid component is homologous (Akin to parent RCC cells) in the majority of cases. We herein report a case of ChRCC with osteosarcomatous (heterologous) differentiation in an elderly gentleman, who developed pulmonary metastasis with an osseous component. Although metastasis is very rare in Chromophobe RCC, Sarcomatoid differentiation.
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