Growth of Intramedullary Spinal Cord Dermoid Cyst from a Congenital Thoracic Dermal Sinus Tract after Negative Screening Ultrasound Imaging.

Introduction: Intramedullary thoracic dermoid cysts are rare lesions that are associated with dermal sinus tracts (DSTs). Current recommendations advocate for imaging-based screening of suspected DSTs shortly after birth to exclude associated inclusion lesions.

Case Presentation: A 6-year-old male child presented with a 2-week history of progressive ataxia, lower limb weakness, and hyperreflexia.