1. Malignant ocular tumour of retinal cells; usually occurs before the third year of life; composed of primitive small round retinal cells

Derived forms: retinoblastomas

Type of: malignant neoplasm, malignant tumor [US], malignant tumour [Brit, Cdn], metastatic tumor [US], metastatic tumour [Brit, Cdn]

Encyclopedia: Retinoblastoma

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