Hypohidrotic ectodermal dysplasia is one of about types of ectodermal dysplasia in humans. Before birth, these disorders result in the abnormal. Disease definition. Hypohidrotic ectodermal dysplasia (HED) is a genetic disorder of ectoderm development characterized by malformation of ectodermal. Hypohidrotic ectodermal dysplasia with immunodeficiency (HED-ID) is a type of HED (see this term) characterized by the malformation of ectodermal structures.

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Hypohidrotic ectodermal dysplasia

Patterned, purple discolorationmarked sweat production. In cases of X-linked HED, direct observation reveals no sweat pores in affected males and decreased numbers of sweat pores in female carriers. The poor predictive value was also demonstrated dypslasia a negative sweat test resultin a volunteer-physician control subject who did not donate a palmar biopsyspecimen.

Another is when a healthy child presentswith a chief complaint of anhidrosis. Of the 18 scalp biopsy specimens, 9 were from subjects who were previously diagnosed with HED and 9 were from unaffected subjects. Additional features of this condition include thin, wrinkled, and dark-colored skin around the eyes; chronic skin problems such as eczema ; and a bad-smelling discharge from hyypohidrotic nose ozena.

Absence of close linkage between the locus for Xg djsplasia the locus for anhidrotic ectodermal dysplasia.

A number sign is used with this entry because X-linked hypohidrotic ectodermal dysplasia-1 ECTD1 is caused by mutation in the gene encoding ectodysplasin-A EDA; on chromosome Xq Manifestation of the lines of Blaschko in women heterozygous for X-linked hypohidrotic ectodermal dysplasia.

The protein regulated encoded by this gene is a type II membrane protein that acts as a homotrimer a protein with three identical units of polypeptide and may be involved in cell-cell signaling during early embryonic development when ectodermal organs are beginning to be formed.

A commercially available 4-mm punch tool hhpohidrotic used to obtain skin biopsy specimens from the hypothenar area of the nondominantpalm and the parietal area of the scalp after injection of local anesthesia 0.


Ectodysplasin-A is expressed in normalfetal and adult skin and hair and in adult teeth. Summary and related texts.

Males are affected by X-linked recessive disorders much more frequently than females. Bovine Model A probably homologous X-linked condition occurs in cattle Ohno, Dysplasiw immune system works to protect the body against invading microorganisms, toxins, and other substances that are recognized as foreign to the body. The patient had been born of a nonconsanguineous couple with maternal age 43 and paternal age General Discussion Hypohidrotic ectodermal dysplasia HED is a rare inherited multisystem disorder that belongs to the group dysplawia diseases known as ectodermal dysplasias.

Kere J, et dysppasia. Clinical description The clinical picture is variable. Genetic mapping of hypohidrotic ectodermal dysplasia: This statement was not recorded in the workshop report, but was communicated by Dr. Of the 15 unaffected subjects, 10 were male and 5 were female.

While the OMIM database is open to the public, users seeking information about a personal medical or genetic condition are urged to consult with a qualified physician for diagnosis and for answers to personal questions. Please note that some of these dysplaxia may provide information concerning certain conditions potentially associated with this disorder [e. In some cases, without appropriate treatment, episodes of hyperpyrexia may result in life-threatening complications; particularly dtsplasia the first two years of life.

Only comments written in English can be processed. Gorlin RJ, et al. Forty subjects underwent starch-iodide paper sweat test ing, 35 donated hair samples for trichogram, 18 underwent a scalp biopsy, and 20 underwent a palmarbiopsy.

Orphanet: Hypohidrotic ectodermal dysplasia with immunodeficiency

For all other comments, please send your remarks via contact us. Register for email alerts with links to free full-text articles Access PDFs of free articles Manage your interests Save searches and receive search alerts. Typical clinical manifestations also include dryness of the skin, eyes, airways, and mucous membranes presumably due to the defective development of several exocrine glands.

Copyright American Medical Association. Focal palmoplantar keratoderma with oral mucosal hyperkeratosis Focal palmoplantar and gingival keratosis Howel—Evans syndrome Pachyonychia congenita Pachyonychia congenita type I Pachyonychia congenita type II Striate palmoplantar keratoderma Tyrosinemia type II punctate: Autosomal dominant inheritance means one copy of the altered gene in each cell is sufficient to cause the disorder. Prenatal diagnosis of X-linked hypohidrotic ectodermal dysplasia by linkage analysis.


Our website uses cookies to enhance your experience. Some carriers, however, have more severe features of this disorder. Gene effect in carriers of anhidrotic ectodermal dysplasia. Specimens from each of these tests were assessed in a blinded ectodermao. A primary feature of HED is a lack of or diminished sweating anhidrosis or hypohidrosisresulting from underdevelopment of or partial or complete absence of certain sweat glands eccrine glands.

Hypohidrotic ectodermal dysplasia is associated with distinctive facial features including a prominent forehead, thick lips, and a flattened bridge of the nose. Ichthyosis bullosa of Siemens Ichthyosis follicularis Ichthyosis prematurity syndrome Ichthyosis—sclerosing hypohidotic syndrome Nonbullous congenital ichthyosiform erythroderma Ichthyosis linearis circumflexa Ichthyosis hystrix.

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The results of quantification of eccrineducts in a 4-mm palmar skin biopsy specimen are similar in affected and controlgroups. Females had sparse, thin scalp hair and mosaic patchy distribution of body hair. Hypohidrotic ectodermal dysplasia is most commonly transmitted in an X-linked recessive fashion; hyponidrotic recessive and dominant transmissionalso occur.

Rare Disease Database

Written wound care instructions were provided. Abnormal bald patches on the scalp alopecia may also be present. Hereditary anhidrotic ectodermal dysplasia: Dental dysllasia at ages 14 and 12 revealed hypodontia, with mostly peg-shaped teeth.

In most cases, the teeth that are present are widely spaced, with front teeth being pointed or cone shaped. FZD4 Familial exudative vitreoretinopathy 1. Dyskeratosis congenita Hypohidrotic ectodermal dysplasia EDA X-linked ichthyosis X-linked endothelial corneal dystrophy. D ICD – Facial morphometrics in the identification of gene carriers of X-linked hypohidrotic ectodermal dysplasia.