[Malignant paragangliomas--the results of radiotherapy in 6 patients].

Between February 1984 and May 1989, six patients (four male, two female) with malignant paragangliomas of the carotid body (n = 4) and glomus jugulare (n = 2) were irradiated in the Department of Radiation Oncology at Essen University. All patients had macroscopic (residual) tumor at the start of treatment. Five out of six paragangliomas had to be considered malignant, since histological lymph node involvement or distant metastasis was confirmed. In the sixth case extra- and intracranial tumor growth was observed. Total doses between 40 and 55 Gy using cobalt 60, 10 or 15 MeV photons were administered. Radiation therapy was canceled at 30.6 Gy in one patient because of multiple distant metastasis. Three out of four patients, who received curative treatments, were locally controlled (25 to 91 months). A local recurrence in one patient was detected 18 months after irradiation; this patient died of distant metastasis 23 months after treatment. In one out of two palliatively irradiated patients, local control could be achieved until the patient died of distant metastasis twelve months after treatment. Grade III- or grade IV-treatment toxicity was not observed. Radiation therapy of malignant paragangliomas with doses between 45 and 54 Gy in five to six weeks is an effective treatment with low toxicity and should be preferred to surgery in glomus jugulare and advanced carotid body tumors.