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| Childhood interstitial lung disease v1.5 | TMEM63B |
Eleanor Williams changed review comment from: Heterozygous variants in TMEM63B are associated with Developmental and epileptic encephalopathy 118 (OMIM:621250, accessed 25th Jun 2026) with a gain-of-function mechanism proposed. Variants reported are either missense or an in-frame deletion. The main phenotypic features are severe early-onset developmental and epileptic encephalopathy, intellectual disability, and severe motor and cortical visual impairment associated with progressive neurodegenerative brain changes (PMID: 37421948, https://www.sciencedirect.com/science/article/pii/S2950221724000394. Hearing loss is reported in mouse TMEM63B knockouts PMID: 32375046). PMID: 42259295 Chan et al 2026 report five individuals from four unrelated families with childhood interstitial lung disease and biallelic predicted loss-of-function variants in TMEM63B. Other phenotypic characteristics include moderate/severe developmental delay (5/5), white matter changes, (1/5), mild global atrophy on brain imaging (1/5) and severe short stature (2/5). None of the individuals had epilepsy or hearing loss. Individuals were from Saudi Arabian, Malay, European and Native American ethnicities. 5 different variants were reported including nonsense, frameshift and splice donor variants. In family A a heterozygous ABCA3 missense variant of unknown significance was also inherited from the mother. Biallelic variants in ABCA3 are associated with Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921. The authors report that while there are 53 TMEM63B pLoF variants in gnomAD v.4.1.0 database none are in the homozygous state. Histopathological examination of lung tissue also showed a pattern consistent with surfactant dysfunction. The authors conclude that biallelic loss of function variants result in a distinct pulmonary-predominant phenotype characterized by hypoxemia, early-onset respiratory failure, histological features of surfactant dysfunction, and chest imaging consistent with chILD. Sources: Literature; to: Heterozygous variants in TMEM63B are associated with Developmental and epileptic encephalopathy 118 (OMIM:621250, accessed 25th Jun 2026) with a gain-of-function mechanism proposed. Variants reported are either missense or an in-frame deletion. The main phenotypic features are severe early-onset developmental and epileptic encephalopathy, intellectual disability, and severe motor and cortical visual impairment associated with progressive neurodegenerative brain changes (PMID: 37421948, doi:10.1016/j.bdcasr.2024.100043. Hearing loss is reported in mouse TMEM63B knockouts PMID: 32375046). PMID: 42259295 Chan et al 2026 report five individuals from four unrelated families with childhood interstitial lung disease and biallelic predicted loss-of-function variants in TMEM63B. Other phenotypic characteristics include moderate/severe developmental delay (5/5), white matter changes, (1/5), mild global atrophy on brain imaging (1/5) and severe short stature (2/5). None of the individuals had epilepsy or hearing loss. Individuals were from Saudi Arabian, Malay, European and Native American ethnicities. 5 different variants were reported including nonsense, frameshift and splice donor variants. In family A a heterozygous ABCA3 missense variant of unknown significance was also inherited from the mother. Biallelic variants in ABCA3 are associated with Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921. The authors report that while there are 53 TMEM63B pLoF variants in gnomAD v.4.1.0 database none are in the homozygous state. Histopathological examination of lung tissue also showed a pattern consistent with surfactant dysfunction. The authors conclude that biallelic loss of function variants result in a distinct pulmonary-predominant phenotype characterized by hypoxemia, early-onset respiratory failure, histological features of surfactant dysfunction, and chest imaging consistent with chILD. Sources: Literature |
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| Childhood interstitial lung disease v1.3 | TMEM63B |
Eleanor Williams changed review comment from: Heterozygous variants in TMEM63B are associated with Developmental and epileptic encephalopathy 118 (OMIM:621250, accessed 25th Jun 2026) with a gain-of-function mechanism proposed. Variants reported are either missense or an in-frame deletion. The main phenotypic features are severe early-onset developmental and epileptic encephalopathy, intellectual disability, and severe motor and cortical visual impairment associated with progressive neurodegenerative brain changes (PMID: 37421948, https://www.sciencedirect.com/science/article/pii/S2950221724000394. Hearing loss is reported in mouse TMEM63B knockouts PMID: 32375046). PMID: 42259295 Chan et al 2026 report five individuals from four unrelated families with childhood interstitial lung disease and biallelic predicted loss-of-function variants in TMEM63B. Other phenotypic characteristics include moderate/severe developmental delay (5/5), white matter changes, (1/5), mild global atrophy on brain imaging (1/5) and severe short stature (2/5). None of the individuals had epilepsy or hearing loss. Individuals were from Saudi Arabian, Malay, European and Native American ethnicities. 5 different variants were reported including nonsense, frameshift and splice donor variants. In family A a heterozygous ABCA3 missense variant of unknown significance was also inherited from the mother. Biallelic variants in ABCA3 are associated with Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921. The authors report that while there are 53 TMEM63B pLoF variants in gnomAD v.4.1.0 database none are in the homozygous state. Histopathological examination of lung tissue also showed a pattern consistent with surfactant dysfunction. The authors conclude that biallelic pLoF variants result in a distinct pulmonary-predominant phenotype characterized by hypoxemia, early-onset respiratory failure, histological features of surfactant dysfunction, and chest imaging consistent with chILD. Sources: Literature; to: Heterozygous variants in TMEM63B are associated with Developmental and epileptic encephalopathy 118 (OMIM:621250, accessed 25th Jun 2026) with a gain-of-function mechanism proposed. Variants reported are either missense or an in-frame deletion. The main phenotypic features are severe early-onset developmental and epileptic encephalopathy, intellectual disability, and severe motor and cortical visual impairment associated with progressive neurodegenerative brain changes (PMID: 37421948, https://www.sciencedirect.com/science/article/pii/S2950221724000394. Hearing loss is reported in mouse TMEM63B knockouts PMID: 32375046). PMID: 42259295 Chan et al 2026 report five individuals from four unrelated families with childhood interstitial lung disease and biallelic predicted loss-of-function variants in TMEM63B. Other phenotypic characteristics include moderate/severe developmental delay (5/5), white matter changes, (1/5), mild global atrophy on brain imaging (1/5) and severe short stature (2/5). None of the individuals had epilepsy or hearing loss. Individuals were from Saudi Arabian, Malay, European and Native American ethnicities. 5 different variants were reported including nonsense, frameshift and splice donor variants. In family A a heterozygous ABCA3 missense variant of unknown significance was also inherited from the mother. Biallelic variants in ABCA3 are associated with Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921. The authors report that while there are 53 TMEM63B pLoF variants in gnomAD v.4.1.0 database none are in the homozygous state. Histopathological examination of lung tissue also showed a pattern consistent with surfactant dysfunction. The authors conclude that biallelic loss of function variants result in a distinct pulmonary-predominant phenotype characterized by hypoxemia, early-onset respiratory failure, histological features of surfactant dysfunction, and chest imaging consistent with chILD. Sources: Literature |
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| Childhood interstitial lung disease v1.3 | TMEM63B |
Eleanor Williams changed review comment from: Heterozygous variants in TMEM63B are associated with Developmental and epileptic encephalopathy 118 (OMIM:621250) with a gain-of-function mechanism proposed. Variants reported are either missense or an in-frame deletion. The main phenotypic features are severe early-onset developmental and epileptic encephalopathy, intellectual disability, and severe motor and cortical visual impairment associated with progressive neurodegenerative brain changes (PMID: 37421948, https://www.sciencedirect.com/science/article/pii/S2950221724000394. Hearing loss is reported in mouse TMEM63B knockouts PMID: 32375046). PMID: 42259295 Chan et al 2026 report five individuals from four unrelated families with childhood interstitial lung disease and biallelic predicted loss-of-function variants in TMEM63B. Other phenotypic characteristics include moderate/severe developmental delay (5/5), white matter changes, (1/5), mild global atrophy on brain imaging (1/5) and severe short stature (2/5). None of the individuals had epilepsy or hearing loss. Individuals were from Saudi Arabian, Malay, European and Native American ethnicities. 5 different variants were reported including nonsense, frameshift and splice donor variants. In family A a heterozygous ABCA3 missense variant of unknown significance was also inherited from the mother. Biallelic variants in ABCA3 are associated with Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921. The authors report that while there are 53 TMEM63B pLoF variants in gnomAD v.4.1.0 database none are in the homozygous state. Histopathological examination of lung tissue also showed a pattern consistent with surfactant dysfunction. The authors conclude that biallelic pLoF variants result in a distinct pulmonary-predominant phenotype characterized by hypoxemia, early-onset respiratory failure, histological features of surfactant dysfunction, and chest imaging consistent with chILD. Sources: Literature; to: Heterozygous variants in TMEM63B are associated with Developmental and epileptic encephalopathy 118 (OMIM:621250, accessed 25th Jun 2026) with a gain-of-function mechanism proposed. Variants reported are either missense or an in-frame deletion. The main phenotypic features are severe early-onset developmental and epileptic encephalopathy, intellectual disability, and severe motor and cortical visual impairment associated with progressive neurodegenerative brain changes (PMID: 37421948, https://www.sciencedirect.com/science/article/pii/S2950221724000394. Hearing loss is reported in mouse TMEM63B knockouts PMID: 32375046). PMID: 42259295 Chan et al 2026 report five individuals from four unrelated families with childhood interstitial lung disease and biallelic predicted loss-of-function variants in TMEM63B. Other phenotypic characteristics include moderate/severe developmental delay (5/5), white matter changes, (1/5), mild global atrophy on brain imaging (1/5) and severe short stature (2/5). None of the individuals had epilepsy or hearing loss. Individuals were from Saudi Arabian, Malay, European and Native American ethnicities. 5 different variants were reported including nonsense, frameshift and splice donor variants. In family A a heterozygous ABCA3 missense variant of unknown significance was also inherited from the mother. Biallelic variants in ABCA3 are associated with Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921. The authors report that while there are 53 TMEM63B pLoF variants in gnomAD v.4.1.0 database none are in the homozygous state. Histopathological examination of lung tissue also showed a pattern consistent with surfactant dysfunction. The authors conclude that biallelic pLoF variants result in a distinct pulmonary-predominant phenotype characterized by hypoxemia, early-onset respiratory failure, histological features of surfactant dysfunction, and chest imaging consistent with chILD. Sources: Literature |
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| Childhood interstitial lung disease v1.3 | TMEM63B |
Eleanor Williams gene: TMEM63B was added gene: TMEM63B was added to Childhood interstitial lung disease. Sources: Literature Mode of inheritance for gene: TMEM63B was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TMEM63B were set to 42259295 Phenotypes for gene: TMEM63B were set to autosomal-recessive TMEM63B-related syndromic surfactant dysfunction disorder Review for gene: TMEM63B was set to AMBER Added comment: Heterozygous variants in TMEM63B are associated with Developmental and epileptic encephalopathy 118 (OMIM:621250) with a gain-of-function mechanism proposed. Variants reported are either missense or an in-frame deletion. The main phenotypic features are severe early-onset developmental and epileptic encephalopathy, intellectual disability, and severe motor and cortical visual impairment associated with progressive neurodegenerative brain changes (PMID: 37421948, https://www.sciencedirect.com/science/article/pii/S2950221724000394. Hearing loss is reported in mouse TMEM63B knockouts PMID: 32375046). PMID: 42259295 Chan et al 2026 report five individuals from four unrelated families with childhood interstitial lung disease and biallelic predicted loss-of-function variants in TMEM63B. Other phenotypic characteristics include moderate/severe developmental delay (5/5), white matter changes, (1/5), mild global atrophy on brain imaging (1/5) and severe short stature (2/5). None of the individuals had epilepsy or hearing loss. Individuals were from Saudi Arabian, Malay, European and Native American ethnicities. 5 different variants were reported including nonsense, frameshift and splice donor variants. In family A a heterozygous ABCA3 missense variant of unknown significance was also inherited from the mother. Biallelic variants in ABCA3 are associated with Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921. The authors report that while there are 53 TMEM63B pLoF variants in gnomAD v.4.1.0 database none are in the homozygous state. Histopathological examination of lung tissue also showed a pattern consistent with surfactant dysfunction. The authors conclude that biallelic pLoF variants result in a distinct pulmonary-predominant phenotype characterized by hypoxemia, early-onset respiratory failure, histological features of surfactant dysfunction, and chest imaging consistent with chILD. Sources: Literature |
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| Childhood interstitial lung disease v0.5 | ABCA3 | Achchuthan Shanmugasundram commented on gene: ABCA3: ABCA3 has been added to the panel for the clinical indication 'R462 Childhood interstitial lung disease' with a green rating as agreed with the NHS Genomic Medicine Service. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Childhood interstitial lung disease v0.2 | ABCA3 | Achchuthan Shanmugasundram reviewed gene: ABCA3: Rating: GREEN; Mode of pathogenicity: ; Publications: ; Phenotypes: Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921, interstitial lung disease due to ABCA3 deficiency, MONDO:0012582; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Childhood interstitial lung disease v0.1 | ABCA3 |
Achchuthan Shanmugasundram gene: ABCA3 was added gene: ABCA3 was added to Childhood interstitial lung disease. Sources: NHS GMS,Expert Review Green Mode of inheritance for gene: ABCA3 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: ABCA3 were set to interstitial lung disease due to ABCA3 deficiency, MONDO:0012582; Surfactant metabolism dysfunction, pulmonary, 3, OMIM:610921 |
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