FINE-NEEDLE ASPIRATION CYTOLOGY OF A RECURRENT MALIGNANT-TUMOR OF THEKIDNEY WITH RHABDOID FEATURES IN AN ADULT - A CASE-REPORT

BACKGROUND: Malignant rhabdoid tumor of the kidney in children is cons idered a distinct entity. Malignant tumors with rhabdoid features in a dults in extrarenal locations and in children over the age of 5 years are considered phenotypic variants. CASE: In a case of recurrent trans itional cell carcinoma with rhabdoid features of the kidney in an adul t, confirmed immunohistochemically and ultrastructurally, fine needle aspiration cytology showed discohesive, large- to medium-sized polygon al cells with eccentric nuclei; prominent nucleoli; abundant, pink cyt oplasm; and paranuclear, eosinophilic density, corresponding to cytopl asmic eosinophilic globules seen in the histologic sections and cytopl asmic filamentous inclusions seen ultrastructurally. CONCLUSION: The c ytologic features of malignant rhabdoid tumors are characteristic.