[Intracranial hypertension syndrome due to giant frontoethmoidal osteoma]

Osteomas are benign lesions that may cause life-threatening complications. Their radiological diagnosis usually is casual. Once diagnosed, periodic radiological follow-ups should be carried out and if growth occurs, surgical measures should be taken to prevent complications. The case of a 53-years-old white male admitted for injuries produced by a traffic accident is reported. He had a history of frontalization syndrome with episodes of disorientation and behavioral changes. Plain radiography, CAT, MRI and bicarotid angiography revealed a bone mass that occupied almost the entire anterior fossa. Intracranial hypertension syndrome caused by a giant ethmoidal osteoma was diagnosed. Surgery using a frontal approach was undertaken.