[Renal cell carcinoma with hydronephrosis due to pelviureteric junction obstruction: a case report].

A 57-year-old male was referred to our hospital with a complaint of dizziness. Abdominal computed tomography and retrograde pyelography revealed a left renal tumor associated with hydronephrosis due to pelviureteric junction (PUJ) obstruction. A radical nephrectomy was performed and histological diagnosis was renal cell carcinoma. Only five cases of renal cell carcinoma with hydronephrosis due to PUJ obstruction have been previously reported in the Japanese literature.