Multiple Congenital Anomalies-Hypotonia-Seizures Syndrome, also known as pign-cdg, is related to multiple congenital anomalies-hypotonia-seizures syndrome 4 and multiple congenital anomalies-hypotonia-seizures syndrome 3, and has symptoms including muscle spasticity, seizures and tremor. An important gene associated with Multiple Congenital Anomalies-Hypotonia-Seizures Syndrome is PIGN (Phosphatidylinositol Glycan Anchor Biosynthesis Class N), and among its related pathways/superpathways are Metabolism of proteins and Post-translational modification: synthesis of GPI-anchored proteins. Affiliated tissues include heart and testis, and related phenotypes are seizure and nystagmus