Fragile X Syndrome
X-linked mental retardation and macro-orchidism
Type of disease: Rare conditions
Fragile X syndrome is a genetic condition involving changes in part of the X chromosome. This condition causes a range of developmental problems including learning disabilities and cognitive impairment. It is the most common form of inherited intellectual disability in males and a significant cause of intellectual disability in females. Other signs and symptoms may include symptoms of autism spectrum disorders, seizures, and characteristic physical features. Fragile X syndrome is caused by a change (mutation) in the FMR1 gene and is inherited in an X-linked dominant manner.Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.