Bloch-Sulzberger syndrome; Bloch-Siemens syndrome
Incontinentia pigmenti (IP) is a rare skin condition passed down through families. It affects the skin, hair, eyes, teeth, and nervous system.
IP is caused by an X-linked dominant genetic defect that occurs on a gene known as IKBKG.
Because the gene defect occurs on the X chromosome, the condition is most often seen in females. When it occurs in males, it is usually lethal in the fetus and results in miscarriage.
With the skin symptoms, there are 4 stages. Infants with IP are born with streaky, blistering areas. In stage 2, when the areas heal, they turn into rough bumps. In stage 3, the bumps go away, but leave behind darkened skin, called hyperpigmentation. After several years, the skin returns to normal. In stage 4, there may be areas of lighter-colored skin (hypopigmentation) that are thinner.
IP is associated with central nervous system problems, including:
The health care provider will perform a physical exam, look at the eyes, and test muscle movement.
To confirm the diagnosis, these tests may be done:
There is no specific treatment for IP. Treatment is aimed at the individual symptoms. For example, glasses may be needed to improve vision. Medicine may be prescribed to help control seizures or muscle spasms.
More information and support groups for people with IP and their families can be found at:
How well a person does depends on the severity of central nervous system involvement and eye problems.
Contact your provider if:
Genetic counseling may be helpful for those with a family history of IP who are considering having children.
Islam MP, Roach ES. Neurocutaneous syndromes. In: Jankovic J, Mazziotta JC, Pomeroy SL, Newman NJ, eds. Bradley and Daroff’s Neurology in Clinical Practice. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 99.
James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Genodermatoses and congenital anomalies. James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM, eds. Andrews' Diseases of the Skin. 13th ed. Philadelphia, PA: Elsevier; 2020:chap 27.
Patterson JW. Disorders of pigmentation. In: Patterson JW, ed. Weedon's Skin Pathology. 5th ed. Philadelphia, PA: Elsevier Limited; 2021:chap 11.BACK TO TOP
Review Date: 6/19/2021
Reviewed By: Ramin Fathi, MD, FAAD, Director, Phoenix Surgical Dermatology Group, Phoenix, AZ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
Health Content Provider
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2023 A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.