Group B Retinoblastoma

**Semantic type:** Classification

**Definition:** Retinoblastoma measuring more than 3 mm in basal dimension or thickness or macular retinoblastoma location (3 mm or less to foveola), or juxtapapillary retinoblastoma location (1.5 mm or less to disc), or clear subretinal fluid 3 mm or less from margin.

**Synonyms:** - Low Risk Retinoblastoma