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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The immune system works to protect the body against invading microorganisms, toxins, and other substances that are recognized as foreign to the body. Scalp biopsy specimens from 6 5 male, 1 female of 9 affected subjectslacked eccrine structures, while all 7 of the scalp biopsy specimens fromcontrol subjects showed some eccrine structures Figure 7.

Hypohidrotic ectodermal dysplasia

Additional information Further information on this disease Ectodedmal s 6 Gene s 2 Other website s 1. In the affected group, there were 17 male subjects,7 female subjects, and 1 person of unknown gender.

Hypohidrotic ectodermal dysplasia is most commonly transmitted in an X-linked recessive fashion; autosomal recessive and dominant transmissionalso occur.

Clinical and radiographic dental findings in X linked hypohidrotic ectodermal dysplasia. Diagnostic methods The diagnosis is often established after hyperthermic episodes or with delayed teeth eruption.

Of the 7 unaffected subjects, 7 were male and none xysplasia female.

Hypohidrotic Ectodermal Dysplasia – NORD (National Organization for Rare Disorders)

Ectodermal dysplasia-1, due to mutation in the EDA gene, is the most frequent form of hypohidrotic ectodermal dysplasia summary ectoderaml Cluzeau et al. Specialised Social Services Eurordis directory. Of these, 15 were unaffected friends or relatives and 25 had HED.

The documents contained in this web site are presented for information purposes only. She was noted to have fine and sparse hair but with no family history.


One limitation of the present study is that all of the subjects who donated biopsy specimens were adolescents or adults.

Pinheiro and Freire-Maia suggested that the syndrome had 2 forms: C ] – Hypoplastic or absent mucous glands which may lead to dried secretions and obstruction [UMLS: Palmar biopsy specimen eccrine structure quantification. Typical clinical manifestations also include dryness of the skin, eyes, airways, and mucous membranes presumably due to the defective development of several exocrine glands. Affected Females In the family reported by Robertsskin involvement in heterozygous females was patchy.

They were then viewed microscopically to quantify the number of eccrine sweat glands and hair follicles and to identify dysplssia malformations.

Ward RE, et al. Researchers also have reported cases in which HED appears to be inherited as an autosomal dominant or recessive genetic trait, but these patterns of inheritance are less common.

Such diagnosis is based upon a thorough clinical evaluation, identification of characteristic physical findings, a detailed patient and family history, and specialized laboratory testing. The skin may be extremely dry due to underdevelopment hypoplasia or absence aplasia of oil-secreting glands sebaceous glands. Ectodermal dysplasi 1, hypohidrotic, X-linked.

Rare Disease Database

These proteins form part of a signaling pathway that is critical for the interaction between two cell layers, the ectoderm and the mesoderm.

All data collection was performed in a blinded fashion. The content of the website and databases of the National Organization for Rare Disorders NORD is copyrighted and may hypohidrootic be reproduced, copied, downloaded or disseminated, in any way, for any commercial or public purpose, without prior written authorization and approval from NORD.

The patient ectodefmal occasional blistering as a child, inability to sweat, although he could tolerate heat, slow-growing hair, and congenital absence of teeth, except for 2 conical teeth in the upper jaw. Birth Defects Orig Artic Ser.


The occurrence of ectodermal dysplasia and corneal dysplasia in one family. A condition is considered X-linked if the mutated gene that causes the disorder is located on the X chromosome, one of the two sex chromosomes. Males are affected by X-linked recessive disorders much more frequently than females.


hypohidrktic In some cases, hyperthermia can cause life-threatening medical problems. Induction of sweat glands by epidermal growth factor in murine X-linked anhidrotic ectodermal dysplasia.

Autosomal dominant inheritance means one copy of the altered gene in each cell is sufficient to cause the disorder. They concluded that the disorder is located in the region Xqq In affected males and females, pubic and underarm axillary hair is typically scant.

Therefore, a scalp biopsy specimen that is bisected at the appropriate level of dermis and that lacks eccrine ductsor glands is highly suggestive of HED.

Furthermore, the scalp is a technically easier site from which to obtain a biopsy specimenand carries a lower risk of ectofermal scarring.

Furthermore, female carriers identified in HED families on the basis of unequivocal dental signs were found to give positive results in 44 of 47 cases. None of 41 additional females with sparse clinical features had skewed X-chromosome inactivation.

Andrews’ Diseases of the Skin: A Guide to the Magnolia State. X-linked hypohidrotic ectodermal dysplasia and t X;12 in a hypphidrotic.