Parajugular Foramen Chondroma

This is the authors' abstract. We don't add key points for this paper.

C HONDROMAS, and the related osteochondromas, are among the most unusual intracranial neoplasms. There have been 102 such tumors reported, 1 ,~0m,~7 ,~9,20 43 of which have been intracranial, usually arising from the sphenoid bone and extending into the parasellar region. The second largest group originate from the parietal or frontoparietal region. Isolated cases of parasagittal or intraventricular tumors have also been reported? An uncommon site of origin is the posterior wall of the petrous bone with extension into the posterior fossa. Seven posterior fossa chondromas have been reported, 3,6,13,14,~s,~9,21 two of these were characteristic of the syndrome of the jugular foramen? ,2~ The symptoms, signs, and radiological picture are such that a correct preoperative diagnosis may be made.