I-Pleomorphic rhabdomyosarcoma igama lezokwelapha elisetshenziselwa ukuchaza uhlobo olungavamile lomdlavuza oluthinta izicubu ezithambile, ikakhulukazi imisipha. "I-Pleomorphic" ibhekisela eqinisweni lokuthi amangqamuzana omdlavuza angathatha izimo namasayizi ahlukene, kuyilapho elithi "rhabdomyosarcoma" libhekisela kumsuka womdlavuza ezicutshini zemisipha. Lolu hlobo lomdlavuza lungenzeka kunoma ibuphi ubudala kodwa luvame ukutholakala kubantu abadala. Yaziwa nangokuthi i-rhabdomyosarcoma yohlobo lwabantu abadala.