title: Haemangiopericytoma diagnosed from a metastasis 11years after surgery for "atypical meningioma".
abstract: Meningeal haemangiopericytoma (HPC) is a rare tumour often mistakenly reported as "vascular meningioma". Unlike meningiomas, HPC has a high rate of local recurrence and distant metastases, which may occur several years after initial treatment. We report a patient in whom a HPC was misdiagnosed as benign vascular meningioma and the patient discharged from follow-up. HPC was diagnosed 11 years later from biopsy of a skeletal metastasis. Histological review of the meningeal tumour confirmed the diagnosis of meningeal HPC. Meningeal HPCs resemble meningiomas clinically, radiologically and even light microscopically. As a result, they can be reported as atypical meningioma, as in this case. HPC's are more aggressive than typical meningiomas, with a high rate of recurrence and distant metastasis, often late in the course of the disease. Management of meningeal HPC differs from that of typical meningioma, with a need for post-operative radiotherapy and long-term follow-up.
authors.affiliation: Department of Radiotherapy, Singleton Hospital, Swansea, UK.
authors.forename: B
authors.initials: B
authors.lastname: Prakasha
authors.forename: R
authors.initials: R
authors.lastname: Jacob
authors.forename: A
authors.initials: A
authors.lastname: Dawson
authors.forename: T
authors.initials: T
authors.lastname: Joannides
mesh_terms: D001859:Bone Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D003937:Diagnosis, Differential; D006393:Hemangiopericytoma / Q000175:diagnosis* / Q000556:secondary*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis*; D008579:Meningioma / Q000175:diagnosis*; D008875:Middle Aged