Objective: To report a case of Wilms' tumor in an adult patient.
Methods: The records of an adult patient with renal tumor is reviewed.
Results: A 23-year-old male consulted for hematuria. Physical examination and patient assessment by ultrasound and CT showed a solid tumor in the right kidney. The patient was submitted to radical surgery. Pathological analysis demonstrated a biphasic nephroblastoma (Wilms' tumor) with infiltration of renal hilar fat (stage II). After surgery, adjuvant chemotherapy with vincristine-actinomycin D was administered for 60 weeks.
Conclusions: Although rare in adults, Wilms' tumor should be included in the differential diagnosis of all renal tumors. Treatment is usually by surgery and chemotherapy with or without radiotherapy, depending on tumor stage.