Osteoblastoma mimicking an idiopathic intracranial hypertension syndrome

Abstract

Osteoblastomas are rare, benign bone tumors mainly arising from the long bones and the posterior vertebral arches. Skull localizations account for approximately 15% of cases. A total amount of thirty cases involving the temporal bone are reported in the literature. Clinical presentation of temporal osteoblastomas often includes local pain and swelling, while 7th and 8th cranial nerve impairment is rare. We report the novel finding of increase intracranial pressure syndrome secondary to dominant transverse-sigmoid sinus junction compression caused by a small temporal bone osteoblastoma. Excision of the tumor with the restoration of venous flow in the sigmoid sinus was followed by a prompt clinical improvement. In the management of patients with a venous sinus compression, restoration of venous drainage should be a priority.

Venous hypertension caused by a meningioma involving the sigmoid sinus: case report

“…On the other hand, identifiable secondary causes included venous thrombosis [ 14 ] or tumor. Intracranial tumor compressing or invading the dural sinuses including meningioma [ 1 , 4 – 9 ], solitary fibrous tumor/hemangiopericytoma [ 15 ], osteoma [ 16 ], osteoblastoma [ 17 ], epidermoid cyst [ 18 ], metastatic carcinoma [ 19 , 20 ], Ewing sarcoma [ 21 ], and cholesteatoma [ 22 ] must be distinguished from venous thrombosis or IIH. Meningiomas are the most common neoplastic lesion causing venous hypertension.…”