Congenital spinal extradural cysts. (Diverticula of spinal arachnoid).
D003560:Cysts / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004568:Electrodiagnosis; D006801:Humans; D013117:Spinal Cord Compression / Q000175:diagnosis*; D013118:Spinal Cord Diseases / Q000175:diagnosis*