<prompt> True about retinoblastoma are all except :ADMost common intraocular tumor of childhoodFemales are more affected than malesBilateral involvement not rare  <response>: RetinoblastomaIncidence: It is the most common intraocular tumor of childhood occurring 1 in 20,000 live births.Age : though congenital, it is not recognized at birth, and is usually seen between 1 and 2 years of age.Sex : There is no sex predisposition.Race : it is rarer in Negroes than whites.Bilaterality : In 25-30 cases, there is bilateral involvement, although one eye is affected more extensively and earlier than the other. 