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FG syndrome 1

Synonyms
Keller syndrome; Mental retardation, large head, imperforate anus, congenital hypotonia, and partial agenesis of corpus callosum; Opitz-Kaveggia syndrome
Modes of inheritance
X-linked recessive inheritance (Orphanet)

Summary

Excerpted from the GeneReview: MED12-Related Disorders
MED12-related disorders include the phenotypes of FG syndrome type 1 (FGS1), Lujan syndrome (LS), X-linked Ohdo syndrome (XLOS), Hardikar syndrome (HS), and nonspecific intellectual disability (NSID). FGS1 and LS share the clinical findings of cognitive impairment, hypotonia, and abnormalities of the corpus callosum. FGS1 is further characterized by absolute or relative macrocephaly, tall forehead, downslanted palpebral fissures, small and simple ears, constipation and/or anal anomalies, broad thumbs and halluces, and characteristic behavior. LS is further characterized by large head, tall thin body habitus, long thin face, prominent nasal bridge, high narrow palate, and short philtrum. Carrier females in families with FGS1 and LS are typically unaffected. XLOS is characterized by intellectual disability, blepharophimosis, and facial coarsening. HS has been described in females with cleft lip and/or cleft palate, biliary and liver anomalies, intestinal malrotation, pigmentary retinopathy, and coarctation of the aorta. Developmental and cognitive concerns have not been reported in females with HS. Pathogenic variants in MED12 have been reported in an increasing number of males and females with NSID, with affected individuals often having clinical features identified in other MED12-related disorders.
Full text of GeneReview (by section):
Summary
GeneReview Scope
Diagnosis
Clinical Characteristics
Genetically Related (Allelic) Disorders
Differential Diagnosis
Management
Genetic Counseling
Resources
Molecular Genetics
Chapter Notes
References
Authors:
Michael J Lyons
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Available tests

59 tests are in the database for this condition.

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Clinical tests (59 available)

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: ARC240, CAGH45, FGS1, HDKR, HOPA, Kto, MED12S, OHDOX, OKS, OPA1, TNRC11, TRAP230, MED12
    Summary: mediator complex subunit 12

Clinical features

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Imported from Human Phenotype Ontology (HPO)

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