Adult Wilms' Tumor is rare. Furthermore, erythrocytosis caused by Wilms' tumor is extremely rare. There are many difficulties in the preoperative diagnosis of the adult Wilms' tumor, and more aggressive and multimodal therapy is recommended in comparison with that of child. We report a case of adult Wilms' tumor associated with erythrocytosis.
Adult* ; Child ; Diagnosis ; Humans ; Polycythemia* ; Wilms Tumor*