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Pigmentary skin disorders v5.16 CRIPT Ida Ertmanska gene: CRIPT was added
gene: CRIPT was added to Pigmentary skin disorders. Sources: Literature
Q3_26_promote_green tags were added to gene: CRIPT.
Mode of inheritance for gene: CRIPT was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CRIPT were set to 24389050; 27250922; 36630262; 37013901
Phenotypes for gene: CRIPT were set to Rothmund-Thomson syndrome, type 3, OMIM:615789; Rothmund-Thomson syndrome type 3, MONDO:0014347
Review for gene: CRIPT was set to GREEN
Added comment: PMID: 37013901 Averdunk et al., 2023
Report of 2 probands diagnosed with Rothmund-Thomson syndrome, harbouring biallelic CRIPT variants.
P1 - 4yo Moroccan female, homozygous for CRIPT: c.132del, p.Ala45Glnfs*86
P2 - 8yo Romanian male homozygous for CRIPT: c.227G>A, p.(Cys76Tyr)
Both patients had facial rash, poikiloderma, sparse hair, short stature, syndactyly of toes, seizures, abnormal teeth, developmental delay, recurrent chest infections; P1 also had cataracts, dystrophic nails, and a proximally placed thumb; only P2 had microcephaly.

Also includes literature review of previously reported patients (PMID: 36630262 Akalın et al., 2023; PMID: 27250922 Leduc et al., 2016; PMID: 24389050 Shaheen et al., 2014) - 4 unrelated probands with unique biallelic CRIPT variants: hmz c.133_134insGG, p.(Ala45Glyfs∗82); hmz c.141del p.(Phe47Leufs∗84); comp het c.8G>A p.(Cys3Tyr) & 1,331 bp del exon 1; hmz c.7_8del; p.(Cys3Argfs∗4).
2 individuals were from Saudi Arabia, one from Turkey, and one African American.
Phenotype: facial rash (3/4), poikiloderma (2/4), short stature (4/4), sparse hair (3/4), Osteopenia/metaphyseal striations (4/4), dystrophic nails (1/4), syndactyly of toes 4&5 (4/4), proportional microcephaly (4/4), dev delay (4/4), recurrent chest infections (4/4), anemia (3/4), variable retinal defects (4/4), abnormal teeth (2/4), scoliosis (4/4), 11 pairs of ribs (2/4).
None of the patients had cataracts.
Microcephaly severity: PMID: 27250922 head circumference was 47 cm (Z=−2.7) at 4 yrs. PMID: 24389050: individuals had head circumference of 45 cm (-2.5SD) and 35 cm (-2.7 SD) respectively at time of report. PMID: 36630262 - proband OFC was 44cm at last evaluation (-4.63 SDS).
Sources: Literature
Pigmentary skin disorders v5.14 DNA2 Ida Ertmanska gene: DNA2 was added
gene: DNA2 was added to Pigmentary skin disorders. Sources: Literature
Q3_26_promote_green tags were added to gene: DNA2.
Mode of inheritance for gene: DNA2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DNA2 were set to 37055165; 40693833
Phenotypes for gene: DNA2 were set to Rothmund-Thomson syndrome, type 4, OMIM:620819; Seckel syndrome 8, OMIM:615807; Rothmund-Thomson syndrome type 4, MONDO:0970950; Seckel syndrome 8, MONDO:0014350
Review for gene: DNA2 was set to GREEN
Added comment: ROTHMUND-THOMSON SYNDROME:
PMID: 37055165 Di Lazzaro Filho et al., 2023
OMIM 620819 summary: Study reported 8 children from 7 families with Rothmund-Thomson syndrome and mutation in the DNA2 gene. 6 of the children were Brazilian and 2 were sibs of Swiss/Portuguese ancestry. Clinical findings included severe growth failure, with some individuals showing signs suggestive of growth hormone or combined pituitary hormone deficiency; widespread poikiloderma; cutaneous photosensitivity and bullae; sparse hair, eyebrows, and eyelashes; dystrophic nails; congenital cataracts and other ocular anomalies, including glaucoma, microphthalmia, and corneal opacities, with Peters anomaly and optic atrophy in 1 patient each; craniofacial dysmorphisms, including severe microcephaly; and skeletal anomalies, including osteopenia, platyspondyly, flared and/or irregular metaphyses, and short metacarpals and phalanges.

6/6 patients above age 2 years had short stature of more than 2 SDS below mean (-4.3 to -8.1SDS). Microcephaly was not severe at birth: between -0.3 to -2.3SDS, but progressed in all patients and was more than -3SDS in unrelated patients.
All 7 probands harboured a recurrent DNA2: c.588–2214A>G intronic variant, in addition to other DNA2 variants in trans: 5 individuals had intragenic exon deletions, one harboured missense variant c.143T>C, p.Leu48Pro (not reported in gnomaD), and sibs in Family 7 had a frameshift variant.

PMID: 40693833 Ay et al., 2025
Report of a female Turkish proband with Rothmund-Thomson syndrome and comp het DNA2 variants: deep intronic c.588-2214A>G and missense c.2519 T>C, Leu840Pro (not in gnomAD v4). She presented with hallmark features of the syndrome: short stature, poikiloderma, corneal dystrophy, bilateral cataracts, skin photosensitivity and blistering, hand contractures, dystrophic nails. Parents are non-consanguineous. Microcephaly not reported; her height was 76cm (-6.3SDS) at 4 yo.

This gene is associated with AR Rothmund-Thomson syndrome, type 4, OMIM:620819 in OMIM as of 11th Sept 2026.
Sources: Literature
Pigmentary skin disorders v1.33 TFE3 Ivone Leong Phenotypes for gene: TFE3 were changed from Intellectual disability with pigmentary mosaicism and storage disorder-like features to Intellectual developmental disorder, X-linked, syndromic, with pigmentary mosaicism and coarse facies, OMIM:301066
Pigmentary skin disorders v0.27 ARSE Catherine Snow Added phenotypes CHONDRODYSPLASIA PUNCTATA 1, X-LINKED RECESSIVE; CDPX1 for gene: ARSE
Publications for gene ARSE were changed from to 7720070
Pigmentary skin disorders v0.25 ARSE Tom Cullup reviewed gene: ARSE: Rating: GREEN; Mode of pathogenicity: ; Publications: 7720070; Phenotypes: CHONDRODYSPLASIA PUNCTATA 1, X-LINKED RECESSIVE, CDPX1; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Pigmentary skin disorders v0.12 ARSE Louise Daugherty Tag new-gene-name tag was added to gene: ARSE.
Pigmentary skin disorders v0.12 ARSE Louise Daugherty commented on gene: ARSE
Pigmentary skin disorders v0.12 PPP1CB Catherine Snow gene: PPP1CB was added
gene: PPP1CB was added to Pigmentary skin disorders. Sources: Expert Review Green,Other
Mode of inheritance for gene: PPP1CB was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: PPP1CB were set to 27681385; 28211982; 27264673
Phenotypes for gene: PPP1CB were set to Noonan syndrome-like disorder with loose anagen hair 2, 617506; Rasopathy with developmental delay, short stature and sparse slow-growing hair
Pigmentary skin disorders v0.8 ARSE Rebecca Foulger Source London North GLH was added to ARSE.
Pigmentary skin disorders v0.4 ARSE Rebecca Foulger reviewed gene: ARSE: Rating: GREEN; Mode of pathogenicity: ; Publications: ; Phenotypes: ; Mode of inheritance:
Pigmentary skin disorders v0.3 ARSE Rebecca Foulger gene: ARSE was added
gene: ARSE was added to Pigmentary skin disorders. Sources: Expert Review Green,NHS GMS
Mode of inheritance for gene: ARSE was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Phenotypes for gene: ARSE were set to Chondrodysplasia punctata