FOXO1 and embryonal rhabdomyosarcoma: Therefore, the results of our study regarding LNM prevalences stratified by anatomical region should be interpreted in the context of established clinicopathologic variables such as the tumour’s histology (ARMS vs. ERMS),56 molecular biology (PAX3/PAX7–FOXO1 fusion status),5,8,57 patient age (<10 years vs. >10 years),58,59 and tumour size (<5 cm vs. >5 cm)59 for RMS patients and histologic subtype31 or tumour invasiveness60 for patients with NRSTS.