Wolf-Hirschhorn syndrome

Wolf-Hirschhorn syndrome

Infobox_Disease
Name = Wolf-Hirschhorn syndrome


Caption =
DiseasesDB = 32279
ICD10 = ICD10|Q|93|3|q|90
ICD9 = ICD9|758.3
ICDO =
OMIM = 194190
MedlinePlus =
eMedicineSubj = ped
eMedicineTopic = 2446
MeshID =

Wolf-Hirschhorn syndrome, also known as deletion 4p and 4p- syndrome was first described in 1961 by the Americans Herbert L. Cooper and Kurt Hirschhorn [Cooper H, Hirschhorn K. Apparent deletion of short arms of one chromosome (4 or 5) in a child with defects of midline fusion. Mammalian Chrom Nwsl. 1961;4:14.] , and thereafter gained worldwide attention by publications by the German Ulrich Wolf, and Hirschhorn and their co-workers, specifically their articles in the German scientific magazine 'Humangenetik'. [Hirschhorn K, Cooper HL, Firschein IL. Deletion of short arms of chromosome 4-5 in a child with defects of midline fusion. Humangenetik. 1965;1(5):479-82.] [Wolf U, Reinwein H, Porsch R, et al. [Deficiency on the short arms of a chromosome No. 4] . Humangenetik. 1965;1(5):397-413.] It is a characteristic phenotype resulting from a partial deletion of chromosomal material of the short arm of chromosome 4.

igns and symptoms

The most common abnormalties seen include severe to profound mental retardation, microcephaly (small head), seizures, poor muscle tone, and cleft lip and/or cleft palate. Characteristic facial features, include strabismus, hypertelorism, down-turned "fishlike" mouth, short upper lip and philtrum, small chin, ear tags or pits, and cranial asymmetry. Occasional abnormalities include heart defects, hypospadias, scoliosis, ptosis, fused teeth, hearing loss, delayed bone age, low hairline with webbed neck, and renal anomalies.

Genetics

Wolf-Hirshhorn syndrome is caused by a partial deletion of the short arm of chromosome 4, particularly in the region of Gene|WHSC1 and Gene|WHSC2. About 87% of cases represent a de novo deletion, while about 13% are inherited from a parent with a chromosome translocation. In the cases of familial translocation, there is a 2 to 1 excess of maternal transmission. Of the de novo cases, 80% are paternally derived. The symptoms and phenotype do not differ based on the size of the deletion. The critical region for determining the phenotype is at 4p16.3 and can often be detected through genetic testing and fluorescent in situ hybridization (FISH). Genetic testing and genetic counseling is offered to affected families.

References

External links

*
* [http://www.orpha.net/data/patho/GB/uk-WHS.pdf Wolf-Hirschhorn syndrome] at www.orpha.net (Adobe .pdf format)
* [http://www.4p-supportgroup.org 4P- Support Group]

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