[Liposarcoma of the perirenal cell].
OBJECTIVE
To show the imaging tests characteristics and differential diagnosis of masses located within the retroperitoneal perirenal area.


METHODS
Diagnostic imaging tests (KUB x-ray, ultrasound, helical CT scan with IV contrast) and follow-up in one case of perirenal cell liposarcoma.


RESULTS
The study of the surgical specimen after renal tumorectomy in a patient with a solitary kidney resulted in the present diagnosis.


CONCLUSIONS
Liposarcoma is a malignant neoplasia derived from fatty tissue. Approximately 13% are located in the retroperitoneal area, and less than 1/3 arise from perinephric fat. We report one case of liposarcoma located in the perirenal cell as an incidental finding during contralateral psoas muscle abscess follow-up in a patient with a solitary kidney after surgery for xanthogranulomatous pyelonephritis. Successive controls during the last year allowed us to evaluate the evolution of this lesion's.
Martínez León
Maria Isabel
MI
Servicio de Radiodiagnóstico y 1 Departamento de Anatomía Patológica, Hospital Universitario Carlos Haya, Málaga, España. marcela337@hotmail.com
Martos Forniels
Juan Antonio
JA
Arranz Salas
Isabel María
IM
Díaz Martí
Teresa
T
D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis; D008080:Liposarcoma / Q000175:diagnosis; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis