Preferred Label : Incontinentia pigmenti;
Symbol : IP;
CISMeF acronym : IP; IP2;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : IP2; Incontinentia pigmenti, familial male-lethal type; Incontinentia pigmenti, type II; Bloch-sulzberger syndrome;
Description : Familial incontinentia pigmenti (IP) is a genodermatosis that segregates as an X-linked
dominant disorder and is usually lethal prenatally in males (The International Incontinentia
Pigmenti Consortium, 2000). In affected females it causes highly variable abnormalities
of the skin, hair, nails, teeth, eyes, and central nervous system. The prominent skin
signs occur in 4 classic cutaneous stages: perinatal inflammatory vesicles, verrucous
patches, a distinctive pattern of hyperpigmentation, and dermal scarring. Cells expressing
the mutated X chromosome are eliminated selectively around the time of birth, so females
with IP exhibit extremely skewed X-inactivation. Familial incontinentia pigmenti is
caused by mutations in the NEMO gene and is here referred to as IP2, or 'classical'
incontinentia pigmenti. Sporadic incontinentia pigmenti, the so-called IP1, which
maps to Xp11, is categorized as hypomelanosis of Ito (300337).;
Inheritance : X-linked dominant;
Molecular basis : Caused by mutation in the inhibitor of nuclear factor kappa B kinase, regulatory subunit
gamma gene (IKBKG, 300248.0001);
Prefixed ID : #308300;
Origin ID : 308300;
UMLS CUI : C0021171;
Automatic exact mappings (from CISMeF team)
Currated CISMeF NLP mapping
DO Cross reference
False automatic mappings
Genes related to phenotype
HPO term(s)
ORDO concept(s)
Semantic type(s)