Abstract
X-ray measurements were made of the length and width of the 3 middle metacarpal bones of both hands, in 61 thalassaemic and 35 control children of both sexes aged 5--13 years. Growth in length of the bone was normal until age 11 years but after this it was smaller in thalassaemic children. The growth of total width in thalassaemic children was greater than that of the controls until age 11 years and then became equal. The proportion of children with bone age retardation was greater after 7 years.