Thrombotic thrombocytopenic purpura is a very rare hereditary blood deficiency disorder of ADAMTS13 (von Willebrand factor-cleaving protease) and a life-threatening thrombotic microangiopathy characterized by thrombocytopenia and microangiopathic hemolytic anemia. The deficiency in ADAMTS13 metalloprotease, which cleaves the von Willebrand factor, may be congenital or acquired. The congenital form is caused by inherited mutations in the ADAMTS13 gene. The diagnosis is challenging due to the nonspecific signs and symptoms, as well as the rarity of the disease.
We present an unusual case of a 20-year-old feoderm woman from northeast region of Brazil who manifested thrombocytopenia during her pregnancy which was believed to be immune thrombocytopenic purpura.
Considering the importance of a differential diagnosis of thrombotic microangiopathic disorders, congenital thrombotic thrombocytopenic purpura may mimic the signs and symptoms of pre-eclampsia/eclampsia, hemolysis with elevated liver enzymes and low platelet count syndrome, and atypical hemolytic-uremic syndrome. It should be considered in suspect cases in patients with an ADAMTS13 activity at 5% without ADAMTS13 antibodies.
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- Inherited thrombotic thrombocytopenic purpura mimicking immune thrombocytopenic purpura during pregnancy: a case report
Valter Romão de Souza Jr
Ana Beatriz Cavalcante de Oliveira
Ana Maria Vanderlei
Amanda Queiroz da Mota Silveira Aroucha
Bruna Pontes Duarte
Aureli Nunes Machado
Lívia Netto Chaer
Cláudia Wanderley de Barros Correia
Maria da Conceição de Barros Correia
Manuela Freire Hazin Costa
- BioMed Central