Abstract
This is a case report of renal cell carcioma, pleomorphic type diagnosed by aspiration cytology in a 57-year-old male. Tumor cells obtained by aspiration cytology were composed of both epithelial clusters of glandular cells with foamy cytoplasm and hyperchromatic nuclei and sarcomatous cells of isolated bizarre or spindle cells. The presence of scattered isolated spindle cells, and bizarre cells with cellular pleomorphism strongly suggested a sarcoma. However. We diagnosed it, a renal cell carcinoma, pleomorphic type because of presence of epithelial cell clusters in addition to sarcomatous cells.
Diagnosis of this case was decided by aspiration cytology. No tumor cells were detected in the urine. Aspiration biopsy cytology is useful to make a diagnosis of renal tumor including renal cell carcinoma of pleomorphic type.
