Lymphoplasmacyte-rich meningioma involving the whole intracranial dura mater

A 47-year-old woman presented with a 6-month history of occipital-cervical region pain, numbness of both upper limbs, and progressive bilateral hearing loss. Enhanced MRI revealed a lesion involving the intracranial dura mater and the right trigone area of the lateral ventricle (figure, A–J). Surgery to relieve the main symptoms was performed through a posterior midline approach (figure, K and L). Pathology suggested the diagnosis of lymphoplasmacyte-rich meningioma (figure, M–P). Lymphoplasmacyte-rich meningioma is a rare variant of meningioma and is categorized as a WHO grade I tumor and approximately 60 cases have been reported,¹ but involvement of the entire intracranial dura mater is unusual. It is characterized by dense lymphoplasmacytic infiltration and usually treated with surgical resection¹; however, total resection could not be achieved in our case. The patient received radiotherapy and postsurgery MRI at 3 months but demonstrated no progress.