Factor XIII deficiency.

A girl and her newborn brother with factor XIII deficiency from a family, which has not previously been reported, as described; two other Israeli families are reviewed. The sexes are equally affected. In two of the three families there was consanguinity among the parents. The families fit autosomal recessive inheritance and rule out X-linked recessive mode of transmission. The proposita was born to unrelated healthy parents from the Bnei Israel Jewish community of Bombay. She was re-admitted to hospital at the age of 15 days after umbilical bleeding. Later in infancy there were repeated haematomata and the diagnosis of factor XIII deficiency was established at the age of 1 1/2 years.