Wiskott-Aldrich syndrome (WAS) is a life-threatening X-linked recessive immunodeficiency disease described as a clinical triad of thrombocytopenia, eczema, and recurrent infections, caused by mutations of the WAS protein (WASP) gene. The milder form of this disease is X-linked thrombocytopenia (XLT) that presents only as platelet abnormalities. Mutation analysis for 15 boys with Wiskott-Aldrich syndrome was performed. Five previously reported mutations and six novel mutations including G8X, R41X, D283E, P412fsX446, E464X, and AfsX358 were detected.