Lipoma of the quadrigeminal cistern: report of 12 cases with clinical and radiological features.

AIM: To present the magnetic resonance imaging (MRI) characteristics and clinical features of 12 patients with quadrigeminal cistern lipoma. MATERIAL AND METHODS: A series of 12 patients with quadrigeminal cistern lipoma were followed up between 2010 and 2013 at the Kayseri Training and Research Hospital's Department of Neurosurgery. MRI characteristics and clinical features of the 12 patients were evaluated. RESULTS: A total of 12 patients were followed up. The mean age was 36.25 years (range 6 - 74 years). All patients' neurological findings were normal, except one patient had strabismus. MRI revealed a tubulonodular type lipoma in eleven patients and curvilinear type lipoma in one patient. Two patients (16.6%) had associated Chiari malformation type 1. Calcification was found only in two patients (16.6%). None of patients had a corpus callosum malformation or associated hydrocephalus. The mean follow-up period was 17.2 months (range 3-36 months) and no patient showed progression. CONCLUSION: Intracranial lipomas are considered benign, slow-growing congenital malformations due to infiltration of adipocytes into the neural tissue and conservative management should therefore be preferred.