Extradural spinal cyst.
D000293:Adolescent; D003560:Cysts / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008297:Male; D013117:Spinal Cord Compression / Q000209:etiology; D013118:Spinal Cord Diseases / Q000150:complications / Q000175:diagnosis* / Q000601:surgery