title: Granular cell tumors of the heart.
abstract: In a study of granular cell tumors arising in the hearts of three patients, no evidence was found, either histologically or ultrastructurally, to support the hypothesis that these tumors are derived from striated muscle or cardiac muscle. The anatomic location of the tumors in all three cases suggests that granular cell tumors are derived from Schwann cells or from the same precursor cell as the Schwann cell.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006338:Heart Neoplasms / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012207:Rhabdomyoma / Q000473:pathology; D012509:Sarcoma / Q000175:diagnosis / Q000473:pathology*