title: The perpendicular nerve root sign.
authors.affiliation: Mount Sinai Hospital, New York, New York.
authors.forename: B R
authors.initials: BR
authors.lastname: Rosenblum
mesh_terms: D006801:Humans; D007405:Intervertebral Disc Displacement / Q000473:pathology* / Q000601:surgery; D008159:Lumbar Vertebrae / Q000601:surgery; D013126:Spinal Nerve Roots / Q000473:pathology*