[Primary ureteral leiomyosarcoma: a rare cause of obstructive uropathy].
OBJECTIVE
Transitional cell carcinoma is the most frequent primary malignant neoplasia obstructive ureteral pathology. Nevertheless, obstructive primary ureteral leiomyosarcoma (stromal tumour) is an unusual disease, diagnosed by histopathological examination of nephroureterectomy surgical specimens.


RESULTS
We report a case of ureteral obstructive uropathy in a 38-year-old woman, with non functional left kidney. Intravenous and retrograde pyelography revealed pyelocalyceal and ureteral dilatation and a large polypoid intraluminal lobulated mass in the pelvic ureter. Pathologic and immunohistochemical techniques showed a nonepithelial, stromal malignant tumour with appearance of smooth muscle cell differentiation: leiomyosarcoma.


CONCLUSIONS
Primary leiomyosarcoma is an unusual ureteral obstructive etiology and should be considered in this condition. Correct preoperative diagnosis is rarely made and this tumour is diagnosed by pathological examination. Abdomino-pelvic computerized tomography scan and ultrasound should be performed before diagnosing a lesion with these features as a primitive ureteral tumour.
Servicio de Radiodiagnóstico, Hospital Clinico Universitario, Málaga, España.
Antonio Javier
AJ
Márquez-Moreno
Emilio
E
Julve-Villalta
Pedro
P
Corral-García
Pedro
P
Gutiérrez-Chacón
Alfredo
A
Blanes-Berenguel
D000328:Adult; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology; D007890:Leiomyosarcoma / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D011859:Radiography; D014516:Ureteral Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D014517:Ureteral Obstruction / Q000209:etiology*