Chondrosarcoma
A chondrosarcoma is a malignant tumor found at the petro-occipital synchondrosis, the joint between the clivus and the petrous bone of the skull.Complications for Chondrosarcoma
Symptoms in patients with these tumors can vary. Some patients have no symptoms at all, and others may have headaches, double vision, facial numbness, hearing loss, and/or dizziness.