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  • Title: First cases of severe congenital factor XIII deficiency in Southwestern Afghanistan in the vicinity of southeast of Iran.
    Author: Hosseini S, Dorgalaleh A, Bamedi T, Tavakol K, Tabibian S, Naderi M, Alizadeh S, Varmaghani B, Shamsizadeh M, Rahimizadeh A, Ebrahimi S.
    Journal: Blood Coagul Fibrinolysis; 2015 Dec; 26(8):908-11. PubMed ID: 26226252.
    Abstract:
    Factor XIII deficiency (FXIIID) is an extremely rare bleeding disorder with the highest global incidence in southeast of Iran. Southwestern Afghanistan (Nimruz Province) is located near the border with Iran in the vicinity of Sistan and Baluchestan Province in southeast Iran, and there seems to be a high prevalence of FXIIID in Nimruz. Thus, this cross-sectional study was designed to assess the prevalence of FXIIID, molecular basis as well as clinical manifestations of FXIIID in Southwestern Afghanistan. During the course of the study, all patients suspected of FXIIID were clinically examined and assessed by routine coagulation tests, including bleeding time, activated partial thromboplastin time, prothrombin time, as well as platelet count and clot solubility test. Patients with normal routine coagulation tests, but abnormal clot solubility test, underwent further investigations by FXIII activity, as well as molecular analysis for FXIII-A gene mutation (Trp187Arg) by PCR-restriction fragment length polymorphism that confirmed by sequencing. Patients with confirmed FXIIID deficiency were registered to receive prophylaxis treatment. All data including demographic information, clinical manifestations, as well as therapeutic response and type and duration of treatment, were recorded, and the data were analyzed by SPSS software. In this cross-sectional study, we found five patients with abnormal clot solubility test, among whom two patients abandoned the study, whereas three patients remained for a more precise study. All the patients were residents of Zaranj city, the capital of Nimruz Province. All these patients had undetectable activity of FXIII, which indicates a severe deficiency. Molecular analysis of patients showed mutation of Trp187Arg in all of them. Hematoma was the most common clinical presentation leading to diagnosis of FXIIID in these patients (100%). Epistaxis (67%), gum bleeding (33%), and hematuria (33%) were other recurrent clinical presentations of the patients. Three cases of death due to FXIIID were detected in the family of these patients. There was a high prevalence of FXIIID in Zaranj city with a population of 50 000, which was appropriately equal to the prevalence of the disorder in southeast of Iran, which seemed to have the highest global prevalence of FXIIID, and underlines that the same mutation (Trp187Arg) in both regions is same.
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