Male siblings with intrauterine growth retardation, hydrops, mild liver dysfunction, chronic diarrhoea, failure to thrive and microcephaly are reported. In both patients, the intrauterine growth retardation was detected in the second trimester of pregnancy. Relatively severe early onset neonatal jaundice, microcytosis, anisocytosis and abnormal iron metabolism were also seen. Bone marrow examination in the second sibling showed marked ringed sideroblasts and multilobulated erythroblasts in late developmental stages. The brain was very small with enlarged cerebrospinal fluid space, a reduced number of gyri and a thin cortex. The clinical and laboratory findings in these patients appear to be unique.
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