Stage III Childhood Retinoblastoma by Toronto Guidelines v2

**Semantic type:** Neoplastic Process

**Definition:** Regional extension: involvement of the orbit and/or preauricular or cervical lymph node extension. (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:** - Retinoblastoma Stage III - Stage III Pediatric Retinoblastoma by Toronto Guidelines v2 - Stage III Retinoblastoma