FOXO1 and rhabdomyosarcoma: Additionally, all of the chimeric RNAs in RH30, an alveolar rhabdomyosarcoma (ARMS) cell line, could be detected at the myogenic time point of PAX3-FOXO1 expression, and seven chimeric RNAs followed the exact transient expression pattern as PAX3-FOXO1, connecting the disease to a development timepoint.