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International Birth Defects Information System



Wolf-Hirschhorn or 4p- deletion syndrome

Wolf-Hirschhorn syndrome is due to a specific chromosomal deletion which is the cause of typical facial features and developmental delays. The anomalies are due to the lack of chromosomal material from the top of one of the number 4 chromosomes. This results in missing genes which account for the anomalies. The degree of deletions and scope of symptoms vary widely and reflect the amount of genetic material that is missing.

Some key features ...

  • Small head size (microcephaly)
  • "Greek helmet like" nose shape
  • Wide spaced eyes (hypertelorism)
  • Mental retardation
  • Note that in some families the syndrome may be due to an inherited chromosomal abnormality.

Our Team Recommends ...

  • Patients and parents undergo chromosome studies since the chromosome deletion may be due to familiar chromosome anomalies.


University of South Alabama
Birth Defects Genetics Center - Mobile, Alabama 36688-0002 / 251-460-7500
For questions or comments contact us or call toll free 1-800-624-1865
Date last changed: April 16, 2003 2:41 PM
http://www.southalabama.edu/genetics