Unusual growth within a meningioma (leukemic infiltrate)

Intracranial meningiomas are generally slow-growing neoplasms. Symptoms dep end on their critical intracranial location. The authors describe a case of rapidly enlarging meningioma that became symptomatic as a result of invasi on by leukemic cells at the time of a blastic crisis in the context of chro nic myeloid leukemia. infiltration of an intracranial meningioma by cells f rom extracranial malignant neoplasms is a rare event. Even though central n ervous system (CNS) or meningeal involvement is common in some hematologic malignancies, this is, to the best of our knowledge, the first report of in vasion of an intracranial meningioma by leukemic cells.