COVID-19-Related Potential Multisystem Inflammatory Syndrome in Childhood in a Neonate Presenting as Persistent Pulmonary Hypertension of the Newborn.

A term infant with persistent pulmonary hypertension of newborn developed clinical and laboratory features of multisystem inflammatory syndrome in childhood (MIS-C) between days 12 and 14. Mother and baby were anti-SARS-Coronavirus-2 (SARS-CoV-2) IgG positive and anti-SARS-CoV-2 IgM negative on day 18, with negative COVID-19 PCR on repeated testing; possible first documentation of neonatal MIS-C following passive transfer of maternal antibodies.