Atypical presentation of Wilms' tumor: evaluation and early diagnosis.

Wilms' tumor is a malignancy that most often affects children. It usually is discovered incidentally by a parent or family member in an asymptomatic child. The development of surgical techniques and the addition of adjuvant therapies have made this once incurable disease curable. The National Wilms' Tumor Study group, developed in 1969, has done extensive research of the disease, and in an ongoing process, performs trials of various treatment modalities to improve the survival of patients with Wilms' tumor. This article describes a patient with an atypical presentation of Wilms' tumor.