Benign Enhancing Foramen Magnum Lesions: Clinical Report of a Newly Recognized Entity.
Intradural extramedullary foramen magnum enhancing lesions may be due to meningioma, nerve sheath tumor, aneurysm, or meningeal disease. In this clinical report of 14 patients, we describe a novel imaging finding within the foramen magnum that simulates disease. The lesion is hyperintense on 3D-FLAIR and enhances on 3D gradient-echo sequences but is not seen on 2D-TSE T2WI. It occurs at a characteristic location related to the posterior aspect of the intradural vertebral artery just distal to the dural penetration. Stability of this lesion was demonstrated in those patients who underwent follow-up imaging. Recognition of this apparently benign lesion may prevent unnecessary patient anxiety and repeat imaging.
From Trinity MRI (B.J.M., J.P.M., S.K.B., M.W.M.), Auckland, New Zealand benmcg@gmail.com.|Neuroradiology Section (B.J.M., S.K.B., M.W.M.), Department of Radiology, Auckland City Hospital, Auckland, New Zealand.
B J
0000-0001-6685-4154
BJ
McGuinness
From Trinity MRI (B.J.M., J.P.M., S.K.B., M.W.M.), Auckland, New Zealand.
J P
0000-0002-2733-0777
JP
Morrison
From Trinity MRI (B.J.M., J.P.M., S.K.B., M.W.M.), Auckland, New Zealand.|Neuroradiology Section (B.J.M., S.K.B., M.W.M.), Department of Radiology, Auckland City Hospital, Auckland, New Zealand.
S K
0000-0002-5259-1581
SK
Brew
From Trinity MRI (B.J.M., J.P.M., S.K.B., M.W.M.), Auckland, New Zealand.|Neuroradiology Section (B.J.M., S.K.B., M.W.M.), Department of Radiology, Auckland City Hospital, Auckland, New Zealand.
M W
0000-0002-0405-8168
MW
Moriarty
D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D005539:Foramen Magnum / Q000000981:diagnostic imaging* / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000473:pathology; D008579:Meningioma / Q000473:pathology; D008875:Middle Aged; D018317:Nerve Sheath Neoplasms / Q000473:pathology