title: Progressive motor deterioration in a 2-year-old boy.
mesh_terms: D001254:Astrocytoma / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002675:Child, Preschool; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D009069:Movement Disorders / Q000209:etiology*; D011859:Radiography; D013120:Spinal Cord Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging