Ten years of prophylactic treatment with fresh-frozen plasma in a child with chronic relapsing thrombotic thrombocytopenic purpura as a result of a congenital deficiency of von Willebrand factor-cleaving protease

Barbot, José; Costa, Elísio; Guerra, Marisol; Barreirinho, Maria Sameiro; Isvarlal, Pratima; Robles, Rodolfo; Gerritsen, Helena; Lammle, Bernhard; Furlan, Miha

http://hdl.handle.net/10198/509

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Authors

Barbot, José

Costa, Elísio

Guerra, Marisol

Barreirinho, Maria Sameiro

Abstract(s)

We report the results of 10 years of prophylactic fresh-frozen plasma (FFP) infusion therapy in a 14-year-old girl with chronic relapsing thrombotic thrombocytopenic purpura (TTP), in whom a severe congenital von Willebrand factor (VWF)-cleaving protease deficiency has been documented. Severe haemolytic crises triggered by infections were prevented and her present renal and neurological functions have been preserved. Sequential measurements of protease activity and platelet count after FFP infusion led us to conclude tentatively that 5% may be sufficient to degrade very large and adhesive VWF multimers.

Keywords

VWF - cleaving protease Deficiency Fresh-frozen plasma Chronic haemolytic anemia Thrombotic thrombo-cytopenic purpura

URI

http://hdl.handle.net/10198/509

Citation

Barbot, José; Costa, Elísio; Guerra, Marisol; Barreirinho, Maria Sameiro; Isvarlal, Pratima; Robles, Rodolfo; Gerritsen, Helena; Lammle, Bernhard; Furlan, Miha (2001). Ten years of prophylactic treatment with fresh-frozen plasma in a child with chronic relapsing thrombotic thrombocytopenic purpura as a result of a congenital deficiency of von Willebrand factor-cleaving protease. British Journal of Hematology. ISSN 1365-2141. 113:3, p. 649-651