Les chondromes intracrniens sont des tumeurs inhabituelles, qui naissent le plus souvent de cellules cartilagineuses rsiduelles situes au niveau de la synchondrose des os de la base du crne. Les chondromes sont le plus frquemment localiss dans les rgions sellaire et parasellaire et gnralement en situation extradurale. Les localisations mninges sont exceptionnelles. Nous rapportons le cas dun patient de 50ans ayant un chondrome volumineux de la convexit et discutons des aspects pathogniques, radiologiques et thrapeutiques de cette entit la lumire dune revue de la littrature.

Intracranial chondromas are unusual tumors, which most commonly arise from cartilage rets in the synchondrosis at the base of the skull. They are most likely found in the sellar and parasellar regions, usually located extradurally. In rare instances, these tumors originate from the dura mater of the convexity. In these cases their neuroradiological features may mimic other intracranial tumors. We present the case of a 50-year-old male presenting a large parasagittal tumor originating in the frontal convexity. MRI-scans revealed a cavitated tumor strongly enhanced after gadolinium infusion mimicking a parasagittal meningioma. There was no obstruction of the superior sagittal sinus as shown by cerebral angiogram. Total excision was achieved and the postoperative course was uneventful. No complementary treatment was therefore considered. The histological examination diagnosis was chondroma. Radiological workup performed at four years follow-up did not reveal any recurrence of the lesion. Pathogenic, clinico-radiological and therapeutic issues are discussed and the literature reviewed.