August 24, 2016
font size

Definition of Syndrome, incontinentia pigmenti

Syndrome, incontinentia pigmenti: A genetic disease that begins soon after birth with the development of blisters on the trunk and limbs. These blisters then heal, but leave dark hyperpigmented streaks and marble-like whorls on the skin. Other key features include dental and nail abnormalities, bald patches and, in about one-third of cases, mental retardation.

Incontinentia pigmenti (IP) is inherited as an X-linked dominant trait. The gene for IP is called IKBKG. A girl with IP has inherited the IKBKG mutation from a parent or has a new IKBKG mutation. IP is lethal in most, but not all, males. Mothers with IP have an equal chance of having a normal son, a normal daughter, and an IP daughter.

Females with IP have nonrandom X-chromosome inactivation. Normally, one X chromosome in each cell of a female is randomly inactivated. In females with certain X-linked conditions, including IP, the X chromosome with the mutant allele is preferentially inactivated. This phenomenon is termed non-random (or skewed) X-chromosome inactivation.

IP is also known as Bloch-Sulzberger syndrome.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/14/2012

Drug Medical Dictionary of Terms by Letter

Top RxList Drug News

Women's Health

Find out what women really need.

Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations