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1. (n.) retinoblastoma
an inheritable tumor of the eye.
Etymology: (1830–40; < Gk rhēt&imacracute;n(ē)resin)
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| Definition of 'retinoblastoma' |
Princeton's WordNet |
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1. (noun) retinoblastoma
malignant ocular tumor of retinal cells; usually occurs before the third year of life; composed of primitive small round retinal cells
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| Definition of 'retinoblastoma' |
U.S. National Library of Medicine |
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1. retinoblastoma
A malignant tumor arising from the nuclear layer of the retina that is the most common primary tumor of the eye in children. The tumor tends to occur in early childhood or infancy and may be present at birth. The majority are sporadic, but the condition may be transmitted as an autosomal dominant trait. Histologic features include dense cellularity, small round polygonal cells, and areas of calcification and necrosis. An abnormal pupil reflex (leukokoria); NYSTAGMUS, PATHOLOGIC; STRABISMUS; and visual loss represent common clinical characteristics of this condition. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, p2104)
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Definitions of retinoblastoma 
