MIS-C has been shown to cause hyponatremia, acute kidney injury, hypoalbuminemia, liver inflammation, lymphopenia with relative neutrophilia, anemia, early thrombocytopenia with late thrombocytosis, systemic inflammation with elevated CRP, ESR, and ferritin, cardiac injury and dysfunction with elevated BNP and troponin, and markers of coagulopathy [5]. The gene discussed is NPPB; the disease is lymphopenia.