Adult Wilms' tumour (report of two cases).

Wilms' tumour, an embryonic neoplasm, the most common renal tumour in childhood, had occasionally been reported in adults. Authors report two such cases and have reviewed the relevant literature. While Wilm's tumour in children classically demonstrates the curative potential of combined modality treatment, no such clear guide lines are available for those occurring during adulthood. Pathologic diagnosis of adult Wilm's tumour is difficult because of the multiplicity of undifferentiated adult tumours that must be considered in the differential diagnosis. As no predictive parameters for optimal therapy exist, a combination of surgery, irradiation and chemotherapy probably is indicated for all stages of disease.