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Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development(CASGID)

MedGen UID:
1673640
Concept ID:
C5193037
Disease or Syndrome
Synonyms: CASGID; INFANTILE CATARACT, SKIN ABNORMALITIES, GLUTAMATE EXCESS, AND IMPAIRED INTELLECTUAL DEVELOPMENT
 
Gene (location): GLS (2q32.2)
 
Monarch Initiative: MONDO:0032685
OMIM®: 618339

Definition

Aside from the clinical features of infantile cataract, skin abnormalities, and impaired intellectual development, CASGID is characterized by strikingly high intracerebral and urinary glutamate excess with almost undetectable glutamine. A gain-of-function mutation in the GLS gene was found (see MOLECULAR GENETICS) (Rumping et al., 2019). GLS loss of function is implicated in developmental and epileptic encephalopathy-71 (DEE71; 618328) and a syndrome of global developmental delay and progressive ataxia (GDPAG; 618412). [from OMIM]

Clinical features

From HPO
Self-injurious behavior
MedGen UID:
88371
Concept ID:
C0085271
Individual Behavior
Self-aggression.
Agitation
MedGen UID:
88447
Concept ID:
C0085631
Sign or Symptom
A state of excessive motor activity that is associated with mental distress or a feeling of substantial unease or inner tension. Distinguished from restlessness by the increased level of emotional distress and negative intensity of the experience. Agitation has a significant level of physical activity that is typically threatening to the self or others.
Global developmental delay
MedGen UID:
107838
Concept ID:
C0557874
Finding
A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.
Reduced eye contact
MedGen UID:
303190
Concept ID:
C1445953
Finding
A reduced frequency or duration of eye contact.
Delayed CNS myelination
MedGen UID:
867393
Concept ID:
C4021758
Anatomical Abnormality
Delayed myelination in the central nervous system.
Secondary microcephaly
MedGen UID:
608952
Concept ID:
C0431352
Finding
Head circumference which falls below 2 standard deviations below the mean for age and gender because of insufficient head growth after birth.
Kyphoscoliosis
MedGen UID:
154361
Concept ID:
C0575158
Anatomical Abnormality
An abnormal curvature of the spine in both a coronal (lateral) and sagittal (back-to-front) plane.
Axial hypotonia
MedGen UID:
342959
Concept ID:
C1853743
Finding
Muscular hypotonia (abnormally low muscle tone) affecting the musculature of the trunk.
Parakeratosis
MedGen UID:
10572
Concept ID:
C0030436
Disease or Syndrome
Abnormal formation of the keratinocytes of the epidermis characterized by persistence of nuclei, incomplete formation of keratin, and moistness and swelling of the keratinocytes.
Subcutaneous nodule
MedGen UID:
101803
Concept ID:
C0151811
Pathologic Function
Slightly elevated lesions on or in the skin with a diameter of over 5 mm.
Hyperkeratosis
MedGen UID:
209030
Concept ID:
C0870082
Disease or Syndrome
Hyperkeratosis is thickening of the outer layer of the skin, the stratum corneum, which is composed of large, polyhedral, plate-like envelopes filled with keratin which are the dead cells that have migrated up from the stratum granulosum.

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