[Mesoblastic nephroma in the adult. Report of a case]

Congenital mesoblastic nephroma is a benign renal tumour of uncertain histogenesis and characteristic histology that can be mistaken with Wilms' tumour and other mesenchymal neoplasias. It is nearly always diagnosed in the early months of life, and its presentation in adults and older children is very rare. Its benign behaviour justifies the diagnostic significance mainly to avoid over-treatment. This paper presents one case of mesoblastic nephroma in a 17-year old female which appeared as a large abdominal mass. The therapeutic approach was radical nephrectomy and, after a 2-year follow-up, the patient has been found to be disease free.