Sézary syndrome associated with sideroblastic anaemia

A 66-year-old man with acquired sideroblastic anaemia and Sézary syndrome is described. This is believed to be the first such case reported in the literature. We speculate on the possibility that a common stem cell defect could account for the simultaneous development of the two abnormalities. Other features of this case of Sézary syndrome are discussed in relation to previous reports on patients with this disease.