Adult Multisystem Inflammatory Syndrome (MIS-A) Associated with SARS-CoV-2 Infection; Literature Review

Since the identification of SARS-CoV-2, a multisystem inflammatory syndrome (MIS-C) that appears in
children after COVID-19 disease and mimics Kawasaki disease was reported in the UK in April 2020,
while it is associated with Covid-19 in adults. Multisystem inflammatory syndrome (MIS-A) was reported
in June 2020. MIS-A patients have been reported to be up to 50 years of age in the literature and are more
likely to have some underlying health condition and have recently had an identifiable respiratory disease
compared to MIS-C. On the other hand, MIS-A patients and MIS-C patients have many overlapping clinical
features, but the severity of cardiac dysfunction, incidence of thrombosis, and MIS-A mortality may be
higher in MIS-A. While it is clear that neutrophilia, lymphopenia, and thrombocytopenia are common in
MIS-C/A, these features, together with elevations in troponin and BNP/NT-proBNP, have been considered
measures of disease activity .