Multiple Congenital Anomalies-Hypotonia-Seizures Syndrome 3, also known as m syndrome, is related to cd40 ligand deficiency and immunodeficiency with hyper-igm, type 1, and has symptoms including seizures An important gene associated with Multiple Congenital Anomalies-Hypotonia-Seizures Syndrome 3 is PIGT (Phosphatidylinositol Glycan Anchor Biosynthesis Class T), and among its related pathways/superpathways are Allograft rejection and Extrafollicular and follicular B cell activation by SARS-CoV-2. The drugs Immunoglobulin G and Immunoglobulins have been mentioned in the context of this disorder. Affiliated tissues include bone and heart, and related phenotypes are nystagmus and osteopenia