[Intracranial lipoma; MR imaging].

Reported here are five patients with intracranial lipoma. Three of these had pericallosal lipoma. One patient had a lipoma in the quadrigeminal cistern. The remaining one had a lipoma in the interpeduncular cistern. All of these tumors were clearly demonstrated and were homogeneously hyperintense on T1-weighted MR images. One patient with a pericallosal lipoma had also partial agenesis of the corpus callosum. However, all patients had no symptoms relating these tumors. It was concluded that MR imaging is useful for diagnosing intracranial lipomas and associating anomalies.