Long thoracic neuropathy caused by an apical pulmonary tumor.

Long thoracic nerve palsy has been reported to have traumatic, iatrogenic, and idiopathic causes. The authors describe the case of a 62-year-old man who presented with progressively worsening right shoulder pain, winging of the scapula, and Horner syndrome. A chest CT scan revealed an apical pulmonary mass. To the authors' knowledge, this is the first report of a long thoracic nerve palsy caused by an apical pulmonary tumor.