title: Post-appendectomy thrombotic thrombocytopenic purpura: a case report and review of the literature.
abstract: Thrombotic thrombocytopenic purpura (TTP) is a syndrome characterized by microangiopathic hemolytic anemia and thrombocytopenia with varying degrees of renal dysfunction, neurologic signs and symptoms, and fever. Evidence has supported that a large proportion of cases of acquired TTP are due to the accumulation of ultralarge von Willebrand factor (vWF) multimers due to an acquired deficiency in the vWF cleaving protease, ADAMTS-13. TTP is rare in the post-surgical setting but is best described after cardiothoracic and vascular surgeries. We present a case of postoperative TTP first presenting with microangiopathic hemolytic anemia and thrombocytopenia 9 days after emergent appendectomy for a ruptured appendix. ADAMTS-13 and factor H levels returned normal and an ADAMTS-13 inhibitor was not identified. To our knowledge, this is the first case report of postoperative TTP after an appendectomy and the first report with correlative ADAMTS-13 data. Plasma exchange with fresh frozen plasma followed by cryopoor plasma, along with steroids resulted in eventual remission of TTP in our patient. Early postoperative diagnosis and aggressive management with consideration of initiation of plasma exchange is imperative to decrease the morbidity and morality associated with TTP.
authors.affiliation: Division of Hematology/Oncology, Department of Medicine, University of Florida College of Medicine and Shands Cancer Center, Gainesville, Florida 32610-0277, USA.
authors.forename: Mandy D
authors.initials: MD
authors.lastname: Robertson
authors.forename: Marc
authors.initials: M
authors.lastname: Zumberg
mesh_terms: D051722:ADAM Proteins / Q000097:blood; D000071120:ADAMTS13 Protein; D001062:Appendectomy; D003404:Creatinine / Q000097:blood; D005260:Female; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008875:Middle Aged; D010951:Plasma Exchange; D010976:Platelet Count; D011183:Postoperative Complications; D011697:Purpura, Thrombotic Thrombocytopenic / Q000097:blood / Q000209:etiology* / Q000628:therapy; D006435:Renal Dialysis; D016896:Treatment Outcome
chemical_list: D006454:Hemoglobins; D003404:Creatinine; D051722:ADAM Proteins; D000071120:ADAMTS13 Protein; C099604:ADAMTS13 protein, human