Trichothiodystrophy 2, Photosensitive; Ttd2

Description

Trichothiodystrophy is a rare autosomal recessive disorder in which patients have brittle, sulfur-deficient hair that displays a diagnostic alternating light and dark banding pattern, called 'tiger tail banding,' under polarizing microscopy. TTD patients display a wide variety of clinical features, including cutaneous, neurologic, and growth abnormalities. Common additional clinical features are ichthyosis, intellectual/developmental disabilities, decreased fertility, abnormal characteristics at birth, ocular abnormalities, short stature, and infections. There are both photosensitive and nonphotosensitive forms of the disorder. Patients with TTD have not been reported to have a predisposition to cancer (summary by Faghri et al., 2008).For a discussion of genetic heterogeneity of TTD, see {601675}.

Clinical Features

Top most frequent phenotypes and symptoms related to Trichothiodystrophy 2, Photosensitive; Ttd2

  • Intellectual disability
  • Short stature
  • Neoplasm
  • Cognitive impairment
  • Ichthyosis
  • Cutaneous photosensitivity
  • Coarse hair
  • Brittle hair
  • Decreased fertility
  • Congenital ichthyosiform erythroderma

And another 2 symptoms. If you need more information about this disease we can help you.

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Incidence and onset information

Not enough data available about incidence and published cases.
No data available about the known clinical features onset.

Researches and researchers

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Trichothiodystrophy 2, Photosensitive; Ttd2 Recommended genes panels

Panel Name, Specifity and genes Tested/covered
Hearing Loss Advanced Sequencing and CNV Evaluation.

By Athena Diagnostics Inc (United States).

BCS1L, ROR1, SALL1, SEMA3E, SIX1, SIX5, SLC12A1, SLC19A2, SLC22A4, SNAI2, SMPX, SOX10, TBX1, TCOF1, TECTA, TFAP2A, TIMM8A, TJP2, TMPRSS3, USH1C , (...)

View the complete list with 149 more genes
Specificity
1 %
Genes
100 %
Ataxia Exome Panel.

By Genetic Services Laboratory University of Chicago (United States).

BCS1L, RTN2, SACS, SCN1A, SCN2A, SCN8A, SCO1, SDHA, SDHD, SLC16A2, SLC17A5, SLC19A2, SLC1A3, SLC20A2, SLC2A1, SLC6A1, SLC9A1, SLC9A6, SNAP25, SOD1 , (...)

View the complete list with 457 more genes
Specificity
1 %
Genes
100 %
ERCC3.

By Institute for Human Genetics University Clinic Freiburg (Germany).

ERCC3
Specificity
100 %
Genes
100 %
CHOP Comprehensive Hereditary Cancer Panel.

By Division of Genomic Diagnostics The Children's Hospital of Philadelphia (United States).

RMRP, RUNX1, BLM, SDHA, SDHB, SDHC, SDHD, BMPR1A, SH2D1A, SLC25A13, BRCA1, BRCA2, SMARCA4, SMARCB1, SMARCE1, BUB1B, EPCAM, XPA, IKZF1, CBL , (...)

View the complete list with 85 more genes
Specificity
1 %
Genes
100 %
Trichothiodystrophy (sequence analysis of ERCC3 gene).

By CGC Genetics (Portugal).

ERCC3
Specificity
100 %
Genes
100 %
OncoRisk Plus (NGS panel for 89 genes).

By CGC Genetics (Portugal).

RUNX1, BLM, SDHB, SDHC, SDHD, BMPR1A, BRCA1, BRCA2, SMARCB1, STK11, BUB1B, EPCAM, TP53, TSC1, TSC2, VHL, WRN, WT1, XPA, XPC , (...)

View the complete list with 68 more genes
Specificity
2 %
Genes
100 %
Trichothiodystrophy (NGS panel of 5 genes).

By CGC Genetics (Portugal).

RNF113A, MPLKIP, GTF2H5, ERCC2, ERCC3
Specificity
20 %
Genes
100 %
Xeroderma pigmentosum group B (XPB, deletion/duplication analysis of ERCC3 gene).

By CGC Genetics (Portugal).

ERCC3
Specificity
100 %
Genes
100 %

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Sources and references

You can check the following sources for additional information.

OMIM Rare Disease Symptoms Checker

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