Simultaneous Chromophobe renal cell carcinoma and squamous renal cell carcinoma

Abstract

Chromophobe renal cell carcinoma (CHRC) is a neoplasm of the kidney with clinicopathologic peculiarities that seems to be of better prognosis than conventional renal cell carcinoma. Classical and eosinophilic types are the two histological variants recorded. Also, it has been described in association with carcinoma of collecting ducts, conventional renal cell carcinoma and sarcomatoid renal cell carcinoma. Squamous renal carcinoma is a very rare neoplasm with a malignant course. We describe a case of simultaneous chromophobe renal cell carcinoma with squamous cell carcinoma, finding which, to the best of our knowledge, has not previously been reported.

Collision tumor of kidney: A case of renal cell carcinoma with metastases of prostatic adenocarcinoma

“…[5] However, we have not come across any case of metastatic prostatic adenocarcinoma in collision with a RCC. The tumors that have been documented to coexist with primary RCC are transitional cell carcinomas,[6] angiomyolipomas,[7] squamous RCCs,[8] collecting duct carcinomas[9] and renal adenocarcinomas and lymphomas. [10] Usually, the renal primary is an incidental finding during the metastatic workup of the other primary,[1] as was true in our case.…”

Primary mesenchymal chondrosarcoma of the kidney with synchronous implant and infiltrating urothelial carcinoma of the ureter

“…Such an observation support a collision of two separate tumors in the lower ureter. There were some reports on a collision of separate tumors in the same location of the urinary system [9,10]. While only vascular invasion is observed with mesenchymal chondrosarcoma, and no observed with urothelial carcinoma, such a pattern of metastasis does not necessarily imply that the two malignancies are biologically distinct.…”