Thrombotic thrombocytopenic purpura: diagnostic criteria, clinical features, and long-term outcomes from 1995 through 2015 by Evaren E. Page, Johanna A. Kremer Hovinga, Deirdra R. Terrell, Sara K. Vesely, and James N. George BloodAdv Volume 1(10):590-600 April 11, 2017 © 2017 by The American Society of Hematology

Evaren E. Page et al. Blood Adv 2017;1:590-600 © 2017 by The American Society of Hematology

All patients enrolled in the Oklahoma TTP Registry each year from 1996 through 2015. All patients enrolled in the Oklahoma TTP Registry each year from 1996 through 2015. (Blue) Patients in whom the diagnosis of TTP was supported by ADAMTS13 activity <10% at the time of their initial episode and by their clinical features. (Red) Patients in whom the diagnosis of TTP was not supported by ADAMTS13 activity <10% or by their clinical features. Evaren E. Page et al. Blood Adv 2017;1:590-600 © 2017 by The American Society of Hematology