Focal Dermal Hypoplasia
Type of disease: Rare conditions
Focal dermal hypoplasia is a genetic disorder that primarily affects the skin, skeleton, eyes, and face. Most individuals with this condition are female. Males usually have milder signs and symptoms than females. Although intelligence is typically unaffected, some individuals have intellectual disability. This condition is caused by mutations in the PORCN gene and is inherited in an X-linked dominant manner. Most cases of focal dermal hypoplasia in females result from new mutations in the PORCN gene and occur in people with no history of the disorder in their family. When focal dermal hypoplasia occurs in males, it always results from a new mutation in this gene that is not inherited. Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.