Le xanthoastrocytome pléomorphe: À propos de cinq observations

Abstract

We present a review of five patients who developed pleomorphic xanthoastrocytomas, presenting the clinical features, pathology findings and therapeutic approach of these rare tumours which almost always occur in children and young adults.This paper is a retrospective study of five patients (three males and two females), treated from 1985 to 1996.Seizure was the most frequent symptom. The tumor was located in the temporal or temporo-parietal lobe in two patients, in the parietal lobe in one, the frontal in one and in hypothalamus and third ventricle in the final patient. To our knowledge, no case of pleomorphic xanthoastrocytoma located in the area of hypothalamus/third ventricle has been reported in the literature. All patients underwent surgery which was complete for two patients, subtotal for two others and partial for one. Four were given post-operative cerebral radiation therapy (two recurrences and malignant transformation and two erroneous diagnoses) (mean dose: 44.75 Gy), for two patients surgery was followed by chemotherapy. One patient was lost for follow-up. Two patients presented at least one tumor recurrence. Two died from malignant transformation. Two patients are alive without recurrence at 12 and 16 years from diagnosis with excellent quality-of-life (Glasgow Outcome Scale=I).Surgery is the gold standard treatment. Prognosis is very good (except for malignant transformation), so that a close long-term clinical and radiological follow-up is mandatory.