Performing whole exome sequencing (WES), single nucleotide substitution of C with T was identified in the exon 24 of FVIII gene (c.6682C>T, p.R2228X) which has previously been reported to cause severe haemophilia A.17The thalassemia‐causing mutation in this patient seems to be two compound heterozygous mutations; NM_000518:exon2:c.93_95del:p.31_32del and NM_000518:g.5248050C>T/c.93‐21G>A, a non‐frameshift deletion in exon 2 and an intronic point mutation (C>T) in HBB gene, respectively (Figure S1B). This evidence concerns the gene HBB and hemophilia A.