Immunohistochemical Scoring of Notch Signaling Components in the whole cohort of pediatric patients with rhabdomyosarcomas (RMS) and in alveolar (PAX3-FOXO1, n = 10; PAX7-FOXO1, n = 2) and embryonal (n = 20) RMS subtypes. The gene discussed is FOXO1; the disease is rhabdomyosarcoma.