<prompt> Wiskott-Aldrich syndrome is characterized by all of the following except:X-linked recessive mode of inheritanceAtopic dermatitis and eczema during infancyThrombocytopeniaIgM is increased  <response>: IgM is decreased in Wiskott-Aldrich syndrome, not increased . Wiskott-Aldrich syndrome characterized by X-linked recessive Thrombocytopenia Infections Eczema It is associated with decreased IgM, increased IgA, and increased IgE levels . Ref: Nelson textbook of pediatrics 21st edition Pgno: 1117 