Five Families with Homozygous δ-Thalassaemia in Japan

Abstract
Five families with .delta.-thalassemia discovered in Ehime, Japan, are presented. The .delta.-thalassemia was associated with a slight elevation of the level of Hb F in 2 families and with normal Hb F levels in 3. Complete absence of HbA2 was found in the homozygous probands. No abnormal clinical or hematological findings were noted in the individuals with .delta.-thalassemia.