ADAMTS13 and autosomal recessive disease: On day 8, genetic analysis confirmed the diagnosis of autosomal recessive familial thrombotic thrombocytopenic purpura and revealed a unique homozygous deletion mutation on exon 23 of ADAMTS13: c.2883del p.(Cys962Alafs <sup><i>∗</i></sup> 3).<h4>Conclusion</h4>cTTP is a rare life-threatening autosomal recessive disease with a high mortality rate.