title: Letter: Fine structure of rhabdomyosarcoma.
mesh_terms: D002648:Child; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D009210:Myofibrils / Q000648:ultrastructure; D009918:Orbital Neoplasms / Q000473:pathology*; D012208:Rhabdomyosarcoma / Q000473:pathology*