Focal classic intradural extramedullary ependymoma near the conus medullaris: A case report and literature review

Rationale: To enhance clinicians’ comprehension of conus medullaris region ependymomas and elevate their diagnostic accuracy. Patient concerns: A 26-year-old female patient had 10 months of low back pain and right lower limb pain. Diagnoses: Lumbar magnetic resonance imaging (MRI) scan revealed a circular abnormal signal in the spinal canal at the level of L2. Pathological examination confirmed classic ependymoma. Interventions: The patient underwent tumor resection surgery. Outcomes: Postoperatively, the patient’s right lower limb soreness improved, and no new neurological deficits were observed. Lessons: Focal classic intradural extramedullary ependymomas near the conus medullaris are rare. Close follow-up with MRI of the craniospinal axis is necessary. Hormonal factors may influence the development of ependymomas in this unusual location. The appearance of these tumors on MRI and contrast-enhanced MRI scans is variable.