Objective. To investigate the magnetic resonance (MR) features of meningeal carcinomatosis, and to improve the ability in understanding and diagnosing meningeal carcinomatosis by MR findings.Methods. Eleven cases with proven meningeal carcinomatosis were studied by conventional and Gd - DTPA enhanced MR imaging. The enhancement patterns and features, as well as the types of meningeal involvement, were retrospectively analyzed.Results. Conventional MR imaging showed no evident meningeal abnormalities. After the administration of Gd - DTPA, abnormal pia mater enhancement was detected in 9 cases, demonstrating as the continuous, thin, and lineal high signal intensity on the brain surface that could descend into the sulci. The abnormal pial enhancement occurred on the cortical surfaces of cerebellum, brainstem, and cerebrum. No abnormal enhancement in the subarach-noid space was found. Abnormal dura - arachnoid enhancement was seen in 3 cases, showing as the continuous, thick, and curvilineal high signal in 相似文献