[Non-functional retroperitoneal paraganglioma].

Non functional retroperitoneal paragangliomas are rare tumors: less than 50 cases are reported in the literature. They are usually asymptomatic and can attain big dimensions. The authors report a case diagnosed by histological examination of the operative specimen. Malignant tumors more frequent than the benign tumors present with a regional extension and delayed metastases. The treatment is completed by surgical excision. Radiotherapy and chemotherapy can be used for palliation of symptoms.