Genetics of Fibromyalgia

FMS predominantly affects women and is characterized by chronic widespread musculoskeletal pain, fatigue, sleep disturbance, and multiple tender points on physical examination. The pathophysiological mechanisms underlying FMS are not clearly understood, but neuroendocrine factors seem to be of major importance. Studies of familial association suggest that genetic factors play a role in FMS. This study will establish patterns of genetic linkage in families with FMS. Participating family members will undergo a brief physical exam (including tender point exam), donate a blood sample, and complete a detailed questionnaire that includes experience with pain, fatigue, depression, bowel symptoms, headache, anxiety, and physical limitations. Measurements of serum serotonin and related compounds will also be obtained. To detect genetic factors, a genome-wide linkage scan using 405 microsatellite markers will be performed.