OBJECTIVE: There is some controversy in the terminology used for transitional cell tumors with mucinous differentiation. METHODS: We report the case of a 50-year-old male with history of recurrent lithiasis whose radological tests discovered a heterogeneous renal pelvis lesion. RESULTS: The histologic study of the lesions determined the diagnosis of transitional cell carcinoma of the renal pelvis with ample mucinous differentiation. CONCLUSIONS: They are rare tumors in such location and the mucinous differentiation does not seem to influence prognosis.
OBJECTIVE: There is some controversy in the terminology used for transitional cell tumors with mucinous differentiation. METHODS: We report the case of a 50-year-old male with history of recurrent lithiasis whose radological tests discovered a heterogeneous renal pelvis lesion. RESULTS: The histologic study of the lesions determined the diagnosis of transitional cell carcinoma of the renal pelvis with ample mucinous differentiation. CONCLUSIONS: They are rare tumors in such location and the mucinous differentiation does not seem to influence prognosis.