Retinoblastoma is bilateral in: (A) 100 % of cases, (B) 1 % of cases, (C) 50 % of cases, (D) 30 % of cases
Answer is D. Retinoblastoma: It is a malignant glioma of the retina, usually unilateral, that occurs in young children and usually is hereditary. In about 30 % of patients retinoblastoma is bilateral. The initial diagnostic finding is usually a yellow or white light reflex seen at the pupil (cat's eye reflex).