Decreased Arm Movement in Non-Verbal Male

Abstract

A 13-year-old non-verbal Trisomy 21 male presents to the emergency department with decreased arm movement four days after witnessed ground level fall. Patient intermittently using arm normally, ambulating, and neurologically at baseline. Arm imaging negative for fracture or dislocation. Review of past medical history reveals prior use of cervical collar for resolved subluxation. Cervical spine imaging reveals complete anterior dislocation of C1 on C2.