HIT presents the clinician with unique diagnostic challenges, especially in the pediatric population. The HIT clinical sequelae of thrombocytopenia and thrombosis are secondary to the activation of platelets by heparin-antibody complexes. Diagnosis involves clinical observations and confirmatory laboratory testing using antibody detection and the functional SRA. As we describe in the following case of a six-yr-old female, the SRA may be difficult to interpret in the case of high-titer antibodies and illustrates the need for repeat testing in cases of high clinical suspicion.
Keywords: heparin-induced thrombocytopenia; serotonin release assay.
© 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.