Stage IV Childhood Non-Hodgkin Lymphoma by Toronto Guidelines v2

**Semantic type:** Neoplastic Process

**Definition:** Initial CNS and/or bone marrow involvement. (Childhood cancer staging for population registries according to the Toronto Childhood Cancer Stage Guidelines - Version 2. Cancer Council Queensland and Cancer Australia: Brisbane, Australia; 2021.)

**Synonyms:** - Non-Hodgkin lymphoma Stage IV - Stage IV Pediatric Non-Hodgkin Lymphoma by Toronto Guidelines v2