Retinitis pigmentosa; pathological findings in two cases.

ALTHOUGH retinitis pigmentosa is a fairly common affection and an important cause of blindness, relatively few cases have been examined histologically. Cogan (1950) found some twenty cases in the literature and himself described three more. The condition most commonly shows a recessive mode of inheritance (Sorsby, 1951), and all the cases so far described for which family histories are recorded appear to be of this type. ' The present paper records two further cases, one of which shows a clearcut dominant mode of inheritance.