title: Absence of "collapsing cord" sign in hydromyelia.
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D009192:Myelography; D011029:Pneumoradiography; D013118:Spinal Cord Diseases / Q000000981:diagnostic imaging*; D013120:Spinal Cord Neoplasms / Q000000981:diagnostic imaging; D014056:Tomography, X-Ray