The Multiple Congenital Anomalies-Hypotonia-Seizures Syndrome (MCAHS) comprises three phenotypes caused by mutations in PIGN, PIGA and PIGT respectively. PIGN and PIGT mutations lead to autosomal recessive disorders whereas PIGA deficiency causes an X-linked lethal disorder. Clinical features are variable dependent on genotypes, often include (neonatal) hypotonia, seizures, various anomalies involving nervous system structural malformations, delayed or lack of psychomotor development, and various congenial organ anomalies.
Category
Inherited metabolic disorder
Brite
Human diseases in ICD-11 classification [BR:br08403]
05 Endocrine, nutritional or metabolic diseases
Metabolic disorders
Inborn errors of metabolism
5C54 Inborn errors of glycosylation or other specified protein modification
H01486 Multiple congenital anomalies-hypotonia-seizures syndrome
Pathway-based classification of diseases [BR:br08402]
Glycan/glycoprotein metabolism
nt06018 GPI-anchor biosynthesis
H01486 Multiple congenital anomalies-hypotonia-seizures syndrome
Jezela-Stanek A, Ciara E, Piekutowska-Abramczuk D, Trubicka J, Jurkiewicz E, Rokicki D, Mierzewska H, Spychalska J, Uhrynowska M, Szwarc-Bronikowska M, Buda P, Said AR, Jamroz E, Rydzanicz M, Ploski R, Krajewska-Walasek M, Pronicka E
Title
Congenital disorder of glycosylphosphatidylinositol (GPI)-anchor biosynthesis--The phenotype of two patients with novel mutations in the PIGN and PGAP2 genes.
van der Crabben SN, Harakalova M, Brilstra EH, van Berkestijn FM, Hofstede FC, van Vught AJ, Cuppen E, Kloosterman W, Ploos van Amstel HK, van Haaften G, van Haelst MM
Title
Expanding the spectrum of phenotypes associated with germline PIGA mutations: a child with developmental delay, accelerated linear growth, facial dysmorphisms, elevated alkaline phosphatase, and progressive CNS abnormalities.
Kvarnung M, Nilsson D, Lindstrand A, Korenke GC, Chiang SC, Blennow E, Bergmann M, Stodberg T, Makitie O, Anderlid BM, Bryceson YT, Nordenskjold M, Nordgren A
Title
A novel intellectual disability syndrome caused by GPI anchor deficiency due to homozygous mutations in PIGT.
