Fibromyalgia: state of the art.

Fibromyalgia (FM) is a common and complex condition, defined as long lasting, widespread musculoskeletal pain, in the presence of tender points (TPs) at specific anatomical sites. Dysautonomic and functional symptoms, such as orthostatic hypotension, tachycardia, effort intolerance, marked fatigue, sleep disorders, cognitive disturbances, psychological distress, paresthesias, headache, genitourinary manifestations, irritable bowel syndrome and bladder dyskinesia, frequently occur. The etiopathogenesis of FM is presently unknown, but nociceptor, autonomic and neuro-endocrine system dysfunctions have been found in patients. Since specific serological or instrumental markers of the syndrome are not yet identifiable, TP search is the only useful diagnostic hallmark. The development of an effective therapy of FM has hitherto been hampered by the incomplete knowledge of its pathogenic mechanisms. In this paper, the most recent information on FM is reviewed.