Among the ERMS and ARMS, there was no clear pattern for wild-type PAX3 mRNA expression, detected in 16 out of 30 primary ERMS and ARMS tumour samples, nor was there any correlation with the presence of PAX3/7-FKHR fusion genes (Figure 1A, B and D). Here, KIDINS220 is linked to alveolar rhabdomyosarcoma.