Hypotrichosis 8; Hypt8

Description

Hypotrichosis simplex refers to a group of hereditary isolated alopecias characterized by diffuse and progressive hair loss, usually beginning in early childhood (Pasternack et al., 2008). Localized autosomal recessive hypotrichosis (LAH) is characterized by fragile hairs that break easily, leaving short, sparse scalp hairs. The disorder affects the trunk and extremities as well as the scalp, and the eyebrows and eyelashes may also be involved, whereas beard, pubic, and axillary hairs are largely spared. In addition, patients can develop hyperkeratotic follicular papules, erythema, and pruritus in affected areas (summary by Schaffer et al., 2006).Woolly hair (WH) refers to a group of hair shaft disorders that are characterized by fine and tightly curled hair. Compared to normal curly hair that is observed in some populations, WH grows slowly and stops growing after a few inches. Under light microscopy, WH shows some structural anomalies, including trichorrhexis nodosa and tapered ends (summary by Petukhova et al., 2009). Several families have been reported in which some affected individuals exhibit features of hypotrichosis and others have woolly scalp hair (Khan et al., 2011).Woolly hair is also a feature of several syndromes, such as Naxos disease (OMIM ) and cardiofaciocutaneous syndrome (OMIM ) (Petukhova et al., 2009), or the palmoplantar keratoderma and cardiomyopathy syndrome (OMIM ) (Carvajal-Huerta, 1998). Genetic Heterogeneity of Hypotrichosis and Woolly HairFor a discussion of genetic heterogeneity of nonsyndromic hypotrichosis, see HYPT1 (OMIM ).For a discussion of genetic heterogeneity of localized hypotrichosis, see LAH1 (HYPT6 ).Another form of autosomal recessive woolly hair with or without hypotrichosis (ARWH2 ) is caused by mutation in the LIPH gene (OMIM ) and is allelic to autosomal recessive localized hypotrichosis (LAH2). ARWH3 (OMIM ) is caused by mutation in the KRT25 gene (OMIM ) on chromosome 17q21.An autosomal dominant form of woolly hair with hypotrichosis (HYPT13 ) is caused by mutation in the KRT71 gene (OMIM ) on chromosome 12q13. Another autosomal dominant form of woolly hair (ADWH ) with normal hair density is caused by mutation in the KRT74 gene (OMIM ) on chromosome 12q13, and is allelic to an autosomal dominant form of hypotrichosis simplex of the scalp (HYPT3 ) as well as an ectodermal dysplasia of the hair/nail type (ECTD7 ).

Clinical Features

Top most frequent phenotypes and symptoms related to Hypotrichosis 8; Hypt8

  • Cardiomyopathy
  • Alopecia
  • Hyperhidrosis
  • Hyperkeratosis
  • Erythema
  • Sparse hair
  • Papule
  • Pruritus
  • Hypotrichosis
  • Palmoplantar keratoderma

And another 22 symptoms. If you need more information about this disease we can help you.

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Incidence and onset information

— Currently we don't have prevalence information about this disease (Not enough data available about incidence and published cases.)
No data available about the known clinical features onset.

Alternative names

Hypotrichosis 8; Hypt8 Is also known as lah3, hypotrichosis, localized, autosomal recessive 3.

Researches and researchers

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Hypotrichosis 8; Hypt8 Recommended genes panels

Panel Name, Specifity and genes Tested/covered
MitoMet®Plus aCGH Analysis.

By Baylor Miraca Genetics Laboratories (United States).

RGS9, RHO, GRK1, RLBP1, RNASEL, BCS1L, RP1, RP2, RP9, RPE65, RPGR, RPL35A, MRPL3, RPS14, RS1, SAG, SARDH, SCO2, SCP2, SDHB , (...)

View the complete list with 612 more genes
Specificity
1 %
Genes
34 %
Inherited Cancer Panel.

By Knight Diagnostic Laboratories - Molecular Diagnostic Center Oregon Health & Science University (United States).

BLM, SDHB, BMPR1A, BRCA1, BRCA2, STK11, EPCAM, TP53, TSC1, TSC2, VHL, XRCC2, CDC73, CDH1, CDK4, CDKN1B, CDKN2A, BRIP1, SDHAF2, TMEM127 , (...)

View the complete list with 28 more genes
Specificity
3 %
Genes
34 %
VistaSeq Brain/CNS/PNS Cancer Panel.

By Molecular Diagnostic Laboratory University of Alberta (Canada).

SMARCB1, TP53, VHL, SUFU, ALK, APC, MEN1, MLH1, MSH2, MSH6, NBN, NF1, NF2, PMS2, PHOX2B, PTCH1, RB1
Specificity
6 %
Genes
34 %
Retinoblastoma.

By Genetic Diagnostic Laboratory University of Pennsylvania School of Medicine (United States).

RB1
Specificity
100 %
Genes
34 %
Genetic testing in retinoblastoma.

By Eye Cancer Genetics Universitätsklinikum Essen (Germany).

RB1
Specificity
100 %
Genes
34 %
Hereditary Cancer Panel, Sequencing and Deletion/Duplication.

By ARUP Laboratories, Molecular Genetics and Genomics (United States).

SDHB, SDHC, SDHD, BMPR1A, BRCA1, BRCA2, SMARCB1, STK11, EPCAM, TP53, TSC1, TSC2, VHL, SUFU, CDH1, CDK4, CDKN1B, CDKN2A, BRIP1, SDHAF2 , (...)

View the complete list with 26 more genes
Specificity
3 %
Genes
34 %
Retinoblastoma.

By Genetic Pathology SA Pathology (Australia).

RB1
Specificity
100 %
Genes
34 %
CancerNext-Expanded.

By Ambry Genetics (United States).

BLM, SDHA, SDHB, SDHC, SDHD, BMPR1A, BRCA1, BRCA2, SMARCA4, SMARCB1, SMARCE1, STK11, EPCAM, TP53, TSC1, TSC2, VHL, XRCC2, SUFU, DICER1 , (...)

View the complete list with 43 more genes
Specificity
2 %
Genes
34 %

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Sources and references

You can check the following sources for additional information.

OMIM MESH Rare Disease Symptoms Checker

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