Bronchopulmonary carcinoid tumor presenting with polymyositis.

We present a patient with a typical bronchopulmonary carcinoid tumor who presented with proximal muscle weakness. Laboratory analysis and a muscle biopsy specimen led to the diagnosis of polymyositis. Chest imaging revealed a bronchopulmonary carcinoid tumor. Symptoms and laboratory derangements remitted after removal of the tumor. This case represents a rare report of a typical carcinoid tumor presenting with the paraneoplastic syndrome of polymyositis.