A Unique Factor XIII Mutation in Southeastern Iran with an Unexpectedly High Prevalence: Khash Factor XIII.

Congenital factor XIII (FXIII) deficiency is an extremely rare hemorrhagic disorder characterized by a deficiency of FXIII and associated with a high rate of morbidity and mortality. The disorder is more frequent in Iran, especially in Khash, a city in the southeast of the country. As identified in the current report, the prevalence of FXIII deficiency in this city is 1 homozygote per approximately 500 population (which is ∼4,000 times higher than the worldwide prevalence) with 3.5% heterozygotes. The disorder is accompanied by a high rate of mortality in rural areas of Khash, given an averaged observed rate of approximately three deaths per each family with FXIII deficiency, mostly due to late-diagnosis and/or misdiagnosis, and fetal consequences of both umbilical cord and central nervous system bleeding. Almost all patients with FXIII deficiency in the southeast Iran have a unique mutation in

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The authors state that they have no conflict of interest.