Abstract

CAMPO DIAZ, Mirta C et al. Hemostasis evaluation in children with type III Ehlers-Danlos syndrome. Rev Cubana Hematol Inmunol Hemoter [online]. 2014, vol.30, n.2, pp. 146-154. ISSN 0864-0289.

Introduction: Although the existence of hemostasis disorders as part of type-III Ehlers-Danlos syndrome has not been confirmed, several coagulation alterations have been reported in isolated cases such as: deficiencies and modification in electrophoresis mobility of fibronectin, dysfunction of platelet aggregation with lengthening of bleeding time, deficiency of VIII, IX, XII and XIII factors and increase of aspirin sensitivity, among others. Objective: Evaluate the existence of hemostasis disorders in children with type III Ehlers-Danlos syndrome. Method: an applied, observational, descriptive and cross-sectional research was carried out in 305 children suffering from type-III Ehlers_Danlos syndrome to evaluate in those having history of hemorrhagic manifestations, the existence of alterations of the hemostasis. Previous suspension of drugs with platelet anti-aggregation action, coagulation and platelet aggregation function studies were carried out. Results: The study revealed that 181 patients presented history of spontaneous or traumatic bleeding mainly mucous-cutaneous. Coagulogram was normal in all cases and peripheral-blood smears showed the presence of macro-platelets and deficient formation of clots as the most frequent alteration. Aggregation and platelet function tests evidenced the presence of qualitative disorders, where a decrease of aggregation prevailed with the use of adenosine diphosphate (ADP), alone or combined with epinephrine and collagen, and with less frequency, disorders of of platelet phospholipids availability. The majority of these patients presented history of long-lasting use of antihistamines (ketotifen) due to diverse causes. Conclusions: The occurrence of these qualitative platelet defects in children with EDS-type III is reported, standing out the role of the use of antihistamine drugs on the onset of the hemorrhagic symptoms in these patients.

Keywords : Type-III Ehlers_Danlos syndrome; antihistamines; coagulation disorders.

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