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Neonatal alloimmune thrombocytopenia (NAITP, NAIT, NATP or NAT) is a disease that affects babies in which the platelet count is decreased because the mother's immune system attacks her fetus' or newborn's platelets. A low platelet count increases the risk of bleeding in the fetus and newborn.
Hemolytic disease of the fetus and newborn (HDN) is a condition where the passage of maternal antibodies results in the hemolysis of fetal/neonatal red cells. The antibodies can be naturally occurring such as anti-A, and anti-B, or immune antibodies developed following a sensitizing event. [ 11 ]
Due to the high mortality of untreated TTP, a presumptive diagnosis of TTP is made even when only microangiopathic hemolytic anemia and thrombocytopenia are seen, and therapy is started. Transfusion is contraindicated in thrombotic TTP, as it fuels the coagulopathy. Since the early 1990s, plasmapheresis has become the treatment of choice for TTP.
One common definition of thrombocytopenia requiring emergency treatment is a platelet count below 50,000/μL. [5] Thrombocytopenia can be contrasted with the conditions associated with an abnormally high level of platelets in the blood – thrombocythemia (when the cause is unknown), and thrombocytosis (when the cause is known). [6] [7]
CAMT is diagnosed by a bone marrow biopsy and is often initially suspected to be fetal and neonatal alloimmune thrombocytopenia. [3] Two types of Congenital amegakaryocytic thrombocytopenia have been identified with type I being more severe. [1] Treatment is mostly supportive, consisting of multiple platelet transfusions.
Primary immune thrombocytopenia (ITP) is an acquired immune-mediated disorder characterized by isolated thrombocytopenia, defined as a peripheral blood platelet count less than 100 x 10 9 /L, and the absence of any obvious initiating and/or underlying cause of the thrombocytopenia.
Hemolytic disease of the newborn, also known as hemolytic disease of the fetus and newborn, HDN, HDFN, or erythroblastosis fetalis, [1] [2] is an alloimmune condition that develops in a fetus at or around birth, when the IgG molecules (one of the five main types of antibodies) produced by the mother pass through the placenta.
The risk of neonatal thrombocytopenia is increased with: [66] Mothers with a history of splenectomy for ITP; Mothers who had a previous infant affected with ITP; Gestational (maternal) platelet count less than 100,000/uL; It is recommended that pregnant women with thrombocytopenia or a previous diagnosis of ITP be tested for serum antiplatelet ...
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