Pure posterior chordoid foramen magnum meningioma: A case report and review of literature.

INTRODUCTION AND IMPORTANCE: Meningiomas are extra-axial central nervous system (CNS) tumors that arise from the arachnoid cells of the dura mater. Only 1.8-3.2% of all meningiomas are located at foramen magnum (FM) and pure posterior FM meningioma are very rare. The diagnosis of malignancy in patients with meningiomas has been a controversial issue. Only a histological study can confirm this situation. CASE PRESENTATION: We report a case of A 52-year-old female presented with a history of neck pain with progressive spastic quadriparesis. CLINICAL DISCUSSION: Magnetic resonance imaging MRI T1 and T2 weighted images revealed well-defied pure posterior foramen magnum Lesion. Although the lesion was very sticky to neurovascular components. Simpson grade I was achieved. Histopathology revealed Chordoid meningioma. The patient had a dramatic recovery. CONCLUSION: Although choroid meningioma is usually well circumscribed, sticky tumors should be suspected. Recurrence of Chordoid meningioma should be suspected. Total excision should be achieved and routine follow-up should be informed. Reports about chordoid meningioma aren't common, but reports on choroid foramen magnum meningioma are very rare. The opportunity to give the patient a symptom-free and normal life should not be missed in such cases.

Complete resection of pure anterior foramen magnum meningioma without neurovascular injuries poses a big challenge: Case report.

INTRODUCTION AND IMPORTANCE: Meningiomas are common neoplasms representing 14.3-19% of all intracranial tumors. Among all the meningiomas, only 1.8-3.2% arises at the foramen magnum (FM) level.Most of the lesions (68%-98%) arising anterolaterally, followed by postolateral, purely posterior and, more rarely, purely anterior. CASE PRESENTATION: We report a case of A 42-year-old female presented with a history of neck pain with progressive spastic hemiparesis. CLINICAL DISCUSSION: MRI revealed well-defied pure anterior and on both sides of vertebral artery, foramen magnum lesion. Through conservative transcondylar approach, Lesion was removed totally in a piecemeal fashion. Histopathology revealed meningothelial meningioma. The patient had a dramatic recovery. CONCLUSION: The exposure allowed by the far-lateral retrocondylar or partial transcondylar approach is adequate for resecting even anterior intradural FMMs.Reports about Foramen magnum meningioma aren't common, but reports on pure anterior foramen magnum meningioma are very rare. The prerequisite for treating FM meningiomas (FMMs) is the perfect knowledge of the surgical anatomy. The opportunity to give the patient a symptom-free and normal life should not be missed in such cases.