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Semin Thromb Hemost 2017; 43(05): 540-548
DOI: 10.1055/s-0037-1603100
Review Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Clinical Scoring Systems in Thrombotic Microangiopathies

Pavan K. Bendapudi
1   Division of Hematology, Massachusetts General Hospital, Boston, Massachusetts
2   Blood Transfusion Service, Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts
3   Harvard Medical School, Boston, Massachusetts
,
Vivek Upadhyay
3   Harvard Medical School, Boston, Massachusetts
4   Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts
,
Lova Sun
3   Harvard Medical School, Boston, Massachusetts
4   Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts
,
Marisa B. Marques
5   Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama
,
Robert S. Makar
2   Blood Transfusion Service, Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts
3   Harvard Medical School, Boston, Massachusetts
› Author Affiliations
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Publication History

Publication Date:
08 June 2017 (online)

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Abstract

Thrombotic microangiopathies (TMAs) are a group of rare but potentially lethal hematologic disorders characterized by platelet-rich thrombi in the microvasculature. In evaluating patients with TMA, it is crucial to identify those who have thrombotic thrombocytopenic purpura (TTP), a subtype of TMA that occurs due to a severe deficiency in ADAMTS13 (a disintegrin and metalloprotease with thrombospondin type 1 motif, member 13). Individuals with TTP require urgent therapeutic plasma exchange, which is associated with a significant reduction in mortality; however, at most centers, the results of ADAMTS13 activity testing are usually not available for 3 to 5 days. Given the possible need for urgent intervention and the lack of timely test results to guide therapy, the assessment of patients with TMA represents an ideal situation for the deployment of diagnostic scoring systems to predict the presence of severe ADAMTS13 deficiency. Here, we review the literature surrounding clinical prediction tools in the diagnosis and prognostication of patients with TMA, describe the experience at our center with evaluating TMA patients, and discuss the utility of clinical scoring systems for TMA in the context of patient care.

Keywords

thrombotic microangiopathy - clinical scoring system - prediction tool - thrombotic thrombocytopenic purpura - treatment recommendations
 

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