Upper Lumbar Mature Cystic Teratoma: A Case Report.

Background: Intradural extramedullary spinal teratoma (IEST) is a rare condition in adults, with a male predominance. It is commonly associated with spinal dysraphism, lumbar puncture, and previous spinal surgery. This case is a 37-year-old male diagnosed with a mature cystic IEST without dysraphism or previous surgical interventions.