[A case of hemangiopericytoma of the pelvis]

Haemangiopericytoma is an uncommon tumour of vascular origin. The authors report a case of one of the rarer sites of this tumour in man: paravesical pelvic haemangiopericytoma. Although modern imaging techniques have provided useful information concerning the hypervascular and clearly demarcated appearance of this tumour which displaces but does not invade adjacent organs, its diagnosis can only be established by histology. Its degree of malignancy and its invasive potential are unclear. The risk of local recurrence and metastases in more than one half of cases justifies wide surgical excision, possibly combined with adjuvant radiotherapy, and long-term follow-up.