 - RMS types included under embryonal rhabdomyosarcoma ERMS include those classified in the 1995 International Classification of Rhabdomyosarcoma ICR as ERMS classic, spindle cell, and botryoid variants, which are reclassified in the 2013 World Health Organization WHO classification as ERMS classic, dense and botryoid variants and spindle cellsclerosing RMS encompassing the historical spindle cell ERMS variant and the newly recognized sclerosing RMS variant; classification of alveolar rhabdomyosarcoma ARMS in the 2013 WHO classification is the same as in the ICR and includes classic and solid variants 