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Data assembled from 5 of 12 sources · Last updated Sep 18, 2026, 9:06 PM UTC
Online Mendelian Inheritance in Man
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 10 | Bilateral tonic-clonic seizure, Seizure, Absent speech |
Head and neck | 7 | Round face, Solitary median maxillary central incisor, Microcephaly |
Arms and legs | 5 | Short foot, Tapered finger, 1-2 toe syndactyly |
Muscles | 3 | Generalized hypotonia, Axial hypotonia, Contracture of the proximal interphalangeal joint of the 3rd finger |
Heart and blood vessels | 2 | Ventricular septal defect, Atrial septal defect |
Bones and joints | 2 | Sideways curvature of the spine (scoliosis), Contracture of the proximal interphalangeal joint of the 3rd finger |
Growth and development | 2 | Intrauterine growth retardation, Growth delay |
Digestive system | 1 | Gastroesophageal reflux |
Eyes | 1 | Unilateral ptosis |
Pregnancy and birth | 1 | Congenital diaphragmatic hernia |
Lungs and breathing | 1 | Partial anomalous pulmonary venous return |
Age of onset: at birth, infancy.
SMC1A function has not been fully characterized.
Developmental and epileptic encephalopathy, 85, with or without midline brain defects is associated with mutations in the SMC1A gene on chromosome X.
Genetic testing for SMC1A is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for developmental and epileptic encephalopathy, 85, with or without midline brain defects has been reported in the published literature.
Phenotype severity distribution: 37 always present features, 3 common features.
No clinical trials have been registered for developmental and epileptic encephalopathy, 85, with or without midline brain defects.
172 publications have been identified in PubMed for developmental and epileptic encephalopathy, 85, with or without midline brain defects. Kisho has analyzed 123 by research type. Research spans Epidemiology / Natural History (24%), Review / Meta-Analysis (20%), and Basic Science / Preclinical (19%).
Research Type | Count | % of Total |
|---|---|---|
Disease patterns and progression | 29 | 24% |
Research summaries | 25 | 20% |
Laboratory research | 23 | 19% |
Patient case studies | 22 | 18% |
Testing and diagnosis research | 11 | 9% |
Clinical study results | 11 | 9% |
New treatment approaches | 2 | 2% |
Sun W (2026). [PMID: 41727492](https://pubmed.ncbi.nlm.nih.gov/41727492/). *Front Immunol*. [Epidemiology / Natural History]
Stresemann S (2026). [PMID: 42153061](https://pubmed.ncbi.nlm.nih.gov/42153061/). *Cureus*. [Case Report / Case Series]
Nishioka M (2026). [PMID: 41501055](https://pubmed.ncbi.nlm.nih.gov/41501055/). *Nat Commun*. [Case Report / Case Series]
Kirkpatrick L (2026). [PMID: 41955623](https://pubmed.ncbi.nlm.nih.gov/41955623/). *Obstet Gynecol*. [Basic Science / Preclinical]
Tan A (2026). [PMID: 41338047](https://pubmed.ncbi.nlm.nih.gov/41338047/). *J Plast Reconstr Aesthet Surg*. [Epidemiology / Natural History]
Connolly C (2026). [PMID: 41693634](https://pubmed.ncbi.nlm.nih.gov/41693634/). *Am J Med Genet A*. [Case Report / Case Series]
AlRayahi J (2026). [PMID: 41670708](https://pubmed.ncbi.nlm.nih.gov/41670708/). *Neuroradiology*. [Review / Meta-Analysis]
Minderhoud CA (2026). [PMID: 41825261](https://pubmed.ncbi.nlm.nih.gov/41825261/). *Pediatr Neurol*. [Basic Science / Preclinical]
Abbott M (2026). [PMID: 40767165](https://pubmed.ncbi.nlm.nih.gov/40767165/). *J Child Neurol*. [Diagnostic / Biomarker]
Das JM (2026). [PMID: 31082030](https://pubmed.ncbi.nlm.nih.gov/31082030/). *Unknown Journal*. [Epidemiology / Natural History]