id author title date pages extension mime words sentences flesch summary cache txt cord-338750-6jfw49y7 Albiol, Nil Autoimmune thrombotic thrombocytopenic purpura (TTP) associated with COVID-19 2020-05-28 .txt text/plain 654 39 49 A thoracic computerized tomography was normal, and a single nasopharyngeal swab (NPS) was reported as negative for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by a polymerase chain reaction (PCR)-based test. Because of the pandemic state of SARS-CoV-2 and associated symptoms [1] , the treating physicians considered the patient to have coronavirus disease 2019 (COVID-19) but with a false-negative result of the PCR NPS test. After initial clinical and laboratory work-up at our institution (Day 9 on Table 1 ), a diagnosis of autoimmune thrombotic thrombocytopenic purpura (TTP) was rapidly established, based on the presence of microangiopathic hemolytic anemia, severe thrombocytopenia, and very low activity (2%) of ADAMTS-13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13) in combination with the presence of an ADAMTS-13 inhibitor, which is an autoantibody to ADAMTS-13 [2, 3] . ./cache/cord-338750-6jfw49y7.txt ./txt/cord-338750-6jfw49y7.txt