Recurrent Wilms' tumor in an adult presenting with bone metastasis. A case report.

Wilms' tumor is a renal tumor that develops in childhood and is one of the most common malignant tumors in children under 5 years old. Bone metastases are extremely rare in Wilms' tumor, with only two reported cases in adults. We report the case of a patient who underwent nephrectomy for Wilms' tumor at the age of 10 years and presented with a bone mass in his left femur 13 years later.