Lipoma of the Quadrigeminal Plate Cistern: Two Case Reports with Review of Literature

Abstract

Intracranial lipomas are benign tumors of rare occurrence representing <0.1% of all primary brain tumors, most often discovered incidentally. Most lipomas were incidentally detected by autopsy or computed tomography (CT). These benign, slow-growing lesions are usually asymptomatic and rarely require surgical intervention. We report two cases of lipomas of the quadrigeminal cistern discovered incidentally on brain MRI, the first case was a 15-year-old adolescent with essential tremor, and the second case was a 40-year-old man with chronic tinnitus with vertigo. In both patients no signs of intracranial hypertension or compression of neural structures were found. Radiological findings were not related to symptoms. The imaging appearance of tectal lamina lipomas on CT and MRI, as well as the different differential diagnoses with a brief review of the literature is presented.