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Background  Mutations in the  ADAMTS13  gene family have been reported to cause congenital thrombotic thrombocytopenic purpura (cTTP), a rare disease characterized by thrombocytopenia and hemolytic anemia. Nearly 150 causative mutations in  ADAMTS13  have been identified; however, only a few of them were detected in Chinese patients.    Case presentation  A 5-year-old Chinese boy presented with history of thrombocytopenic purpura, hemolytic anemia, and renal injury since the neonatal period. Gene analysis revealed two novel mutations in  ADAMTS13 : a missense mutation 332G > A (p:Gly111Glu) in exon4 and a nonsense mutation 3121C > T (p:Gln1041stop) in exon 24. Genetic analysis of his parents confirmed the heterozygous nature of the mutations.    Conclusion  We report two novel mutations in  ADAMTS13  (332G > A, 3121C > T) in a Chinese boy. These two mutations may lead to early onset of cTTP and severe symptoms.

Two novel mutations in ADAMTS13 in a Chinese boy with congenital thrombocytopenic purpura: a case report