Malignant Primary Skull Base Lesions

Chondrosarcoma

These are malignant tumors of cartilage that may arise in bone or soft tissues. They comprise 6% of skull base neoplasms [5]. Approximately 75% of all cranial chondrosarcomas occur at the base of the skull, and most of these are found in the middle cranial fossa.

These tumors affect both sexes equally and occur over a broad age range, with a peak distribution at between 30 and 50 years of age. Symptoms vary according to the site of origin but the most common include headaches, visual

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