Mutational screening of thrombopoietin receptor gene (c‐mpl) in patients with congenital thrombocytopenia and absent radii (TAR)

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Abstract
Thrombocytopenia with absent radii (TAR) is a rare autosomal recessive disease characterized by hypomegakaryocytic thrombocytopenia and bilateral radial aplasia. We performed mutational screening of coding and promoter regions of the c‐mpl gene, encoding thrombopoietin (TPO) receptor, by sequence analysis in four unrelated patients affected by TAR syndrome. Our results indicate that c‐mpl gene mutations are not a common cause of thrombocytopenia in TAR syndrome.