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Subjects/Ophthalmology/Ophthalmology
Ophthalmology
medium
eye Ophthalmology

The most common mode of spread of retinoblastoma:

A. Optic nerve invasion
B. Lymphatics
C. Vascular
D. Direct invasion

Explanation

Ans: A. Optic nerve invasion(Ref Kanski 7/e p510-517; Yanoff and Duker 4/e p793)Most common mode of retinoblastoma spread-By optic nerve invasion.Direct extension by continuity to optic nerve & brain seen.Retinoblastoma:Primary malignant intraocular neoplasm.Arising from immature retinoblasts within developing retina.Most common primary intraocular malignancy of childhood in all-racial groups.Strong tendencies invading brain optic nerve & metastasize widely.

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