Type of disease: Rare conditions
Leprechaunism is a congenital (present from birth) condition characterized by extreme insulin resistance, pre- and postnatal growth delays, characteristic facial features, skin abnormalities, muscular hypotrophy (reduced muscle mass) and enlarged external genitalia in both males and females. The condition is caused by mutations in the insulin receptor gene (INSR) gene. It is inherited in an autosomal recessive manner.
Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.