NRAS and neuroblastoma: Metastatic disease (pathological stage) was diagnosed in three cases (8.33%), two patients with liver metastasis and one with peritoneal metastasis.We evaluated the presence of Kirsten rat sarcoma virus (KRAS), Neuroblastoma-RAS (NRAS), and v-RAF murine sarcoma viral oncogene homolog B1 (BRAF) mutations in the study group.