title: Intraspinal epidermoid cyst: diffusion-weighted MRI.
abstract: We report a 7-year-old boy who presented with two-month history of worsening low back and right leg pain. Conventional MR images demonstrated a poorly outlined intradural mass recognized by the displacement of the conus medullaris and the nerve roots of the cauda equina at the L2-3 level. The signal intensity of the lesion was similar to CSF There was no contrast enhancement of the lesion. Diffusion-weighted images and ADC values revealed restricted diffusion within the mass. Myelography confirmed the mass as an intradural filling defect with myelographic block at the L2-3 level. The patient underwent total surgical excision of the mass. Pathologic examination revealed the diagnosis of epidermoid cyst.
authors.affiliation: Department of Radiology, University of Minnesota Medical School & Hennepin County Medical Center, Minneapolis 55455, USA.
authors.forename: M
authors.initials: M
authors.lastname: Teksam
authors.forename: S O
authors.initials: SO
authors.lastname: Casey
authors.forename: E
authors.initials: E
authors.lastname: Michel
authors.forename: M
authors.initials: M
authors.lastname: Benson
authors.forename: C L
authors.initials: CL
authors.lastname: Truwit
mesh_terms: D002648:Child; D004814:Epidermal Cyst / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013118:Spinal Cord Diseases / Q000175:diagnosis*