Granular cell myoblastoma arising from the thoracic sympathetic nerve chain.
D002648:Child; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000473:pathology*; D009379:Neoplasms, Muscle Tissue / Q000473:pathology*; D013564:Sympathetic Nervous System / Q000473:pathology*