Stage III Childhood Non-Hodgkin Lymphoma by Toronto Guidelines v2

**Semantic type:** Neoplastic Process

**Definition:** Tumors (extranodal) or nodal areas on both sides (above and below) of the diaphragm or any primary intrathoracic tumors (mediastinal, hilar, pulmonary, pleural, or thymic) or extensive (unresectable) primary intra-abdominal disease or any paraspinal or epidural tumors regardless of other tumor sites. (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 III - Stage III Pediatric Non-Hodgkin Lymphoma by Toronto Guidelines v2