Preferred Label : Aicardi-goutieres syndrome 1;
Symbol : AGS1;
CISMeF acronym : AGS; AGS1;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : Encephalopathy, familial infantile, with intracranial calcification and chronic cerebrospinal
fluid lymphocytosis; Cree encephalitis; Pseudotoxoplasmosis syndrome; AGS;
Included titles and symbols : Aicardi-goutieres syndrome 1, autosomal dominant;
Description : Aicardi-Goutieres syndrome is a genetically heterogeneous autosomal recessive encephalopathy
characterized in its most severe form by cerebral atrophy, leukodystrophy, intracranial
calcifications, chronic cerebrospinal fluid (CSF) lymphocytosis, increased CSF alpha-interferon
(IFNA1; 147660), and negative serologic investigations for common prenatal infections
(Ali et al., 2006). AGS is phenotypically similar to in utero viral infection. Severe
neurologic dysfunction becomes clinically apparent in infancy, and manifests as progressive
microcephaly, spasticity, dystonic posturing, profound psychomotor retardation, and
often death in early childhood. Outside the nervous system, thrombocytopenia, hepatosplenomegaly,
and elevated hepatic transaminases along with intermittent fever may also erroneously
suggest an infective process (Crow et al., 2006). In a review of AGS, Stephenson (2008)
noted that an expanded phenotypic spectrum has been recognized and that most of the
original criteria for diagnosis no longer apply: affected individuals may show later
onset and may not have severe or progressive neurologic dysfunction, calcification
of the basal ganglia, or CSF lymphocytosis. The appearance of chilblains is an important
clinical sign for correct diagnosis. The most severe neonatal form of AGS is typically
due to mutation in the TREX1 gene. Cree encephalitis was originally considered a separate
disorder, but genetic evidence has shown that it is the same as AGS1. See also pseudo-TORCH
syndrome (251290), which shows phenotypic overlap and may in some cases represent
AGS (Crow et al., 2000; Crow et al., 2003). AGS is distinct from the similarly named
Aicardi syndrome (304050), which is characterized by agenesis of the corpus callosum,
spinal skeletal abnormalities, and chorioretinal abnormalities. - Genetic Heterogeneity
of Aicardi-Goutieres Syndrome See also AGS2 (610181), caused by mutation in the gene
encoding subunit B of ribonuclease H2 (RNASEH2B; 610326) on chromosome 13q; AGS3 (610329),
caused by mutation in the RNASEH2C gene (610330) on chromosome 11q13.2; AGS4 (610333),
caused by mutation in the RNASEH2A gene (606034) on chromosome 19p13.13; AGS5 (612952),
caused by mutation in the SAMHD1 gene (606754) on chromosome 20; and AGS6 (615010),
caused by mutation in the ADAR1 gene (146920) on chromosome 1q21.;
Inheritance : Autosomal recessive; Autosomal dominant;
Molecular basis : Caused by mutation in the 3-prime repair exonuclease 1 gene (TREX1, 606609.0001);
Laboratory abnormalities : Increased CSF alpha-interferon; Increased serum alpha-interferon (IFNA1, 147660); CSF lymphocytosis; Abnormal liver function tests;
Prefixed ID : #225750;
Origin ID : 225750;
UMLS CUI : C0796126;
Automatic exact mappings (from CISMeF team)
- aging [CISMeF Querying Strategy]
Broader ORDO disease(s)
Currated CISMeF NLP mapping
DO Cross reference
False automatic mappings
Genes related to phenotype
HPO term(s)
ORDO concept(s)
See also inter- (CISMeF)
Semantic type(s)
UMLS correspondences (same concept)
Validated automatic mappings to NTBT