Wolf-Hirschhorn syndrome

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Wolf-Hirschhorn syndrome
ICD-10 Q93.3
ICD-9 758.3
OMIM 194190

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and keywords: deletion 4p; 4p- syndrome; chromosome 4p16.3 deletion syndrome; Pitt-Rogers-Danks syndrome; PRDS; Pitt syndrome; Wittwer syndrome

Overview

Wolf-Hirschhorn syndrome is a rare disease due to the deletion of the short arm on chromosome 4 which causes severe to profound mental retardation, microcephaly (small head), seizures, poor muscle tone, and cleft lip and/or cleft palate.

Historical Perspective

Wolf-Hirschhorn syndrome was first described in 1961 by the Americans Herbert L. Cooper and Kurt Hirschhorn[1], 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'.[2] [3]It is a characteristic phenotype resulting from a partial deletion of chromosomal material of the short arm of chromosome 4.

Pathophysiology

Wolf-Hirshhorn syndrome is caused by a partial deletion of the short arm of chromosome 4, particularly in the region of WHSC1 and 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.

Associated Conditions

Diagnosis

Symptoms

Physical Examination

General

Head

Eyes

Ears

Throat

Neck

Genitourinary

Extremities

References

  1. 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.
  2. 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.
  3. Wolf U, Reinwein H, Porsch R, et al. [Deficiency on the short arms of a chromosome No. 4]. Humangenetik. 1965;1(5):397-413.

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