Congenital dyserythropoietic anaemia type I. Report of two siblings from Saudi Arabia.

This study describes two siblings (a boy and a girl) affected with congenital dyserythropoietic anaemia type I. It is the seventh familial occurrence reported. The girl presented in the neonatal period with anaemia, jaundice and hepatosplenomegaly and required 4 blood transfusions in the first 7 months of life, while her brother was discovered to be anaemic and jaundiced only at the age of 2 years and did not receive any blood transfusion.