PAX3 and alveolar rhabdomyosarcoma: We demonstrated that circulating miR-26a expression inversely correlated with RMS fusion status (p = 0.0177, Mann-Whitney test), since PAX3-7/FOXO1-positive RMS cases displayed lower levels of miR-26a compared to fusion-negative ones (Figure 3A), as it was in ARMS (mostly fusion-positive) than ERMS patients (all fusion-negative), although such a difference was not statistically significant (p = 0.0587 Mann-Whitney Figure 3C).