[Multilocational cystic nephroma. Review of a case with reference to echographically observed changes].
OBJECTIVE
To describe an additional case of multilocular cystic nephroma, with special reference to the sonographic features of a renal cystic lesion.


METHODS
The clinical and radiological features of a kidney tumor in a 61-year-old female patient were retrospectively analyzed.


RESULTS
The preoperative diagnosis was that of a complex multicystic renal mass suggestive of a renal carcinoma. Radical nephrectomy was performed; histopathological analysis of the surgical specimen disclosed a multilocular cystic nephroma. An ultrasound scan 18 months earlier had demonstrated a simple renal cyst in the same site.


CONCLUSIONS
Multilocular cystic nephroma is a tumor that is difficult to diagnose preoperatively. Making an accurate differential diagnosis is of interest, since it will permit conservative treatment. The case described herein supports the hypothesis with regard to the pathogenesis of this lesion, since it had previously showed sonographic features of a simple renal cyst.
Servicio de Urología, Hospital del Bierzo, Ponferrada, León, España.
F J
FJ
Madrid García
I
I
Serrano
J A
JA
Rivas Escudero
L
L
Parra Muntaner
F
F
Vesga Molina
S
S
Gómez Cisneros
J
J
García Alonso
D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D008875:Middle Aged; D014463:Ultrasonography; D009396:Wilms Tumor / Q000000981:diagnostic imaging* / Q000601:surgery