Retinoblastoma in an eye with congenital uveal coloboma.

Retinoblastoma and congenital ocular abnormalities rarely coexist. The appearance of an intraocular tumor in a child with preexisting leukokoria may make the diagnosis of retinoblastoma more challenging. This report describes a unique case of unilateral congenital uveal coloboma and ipsilateral retinoblastoma in a patient with no family history of either abnormality and normal cytogenetic analysis.