Fibromyalgia, chronic fatigue syndrome, and myofascial pain syndrome.

No major pathophysiologic or therapeutic findings have appeared over the past year regarding fibromyalgia, chronic fatigue syndrome, and myofascial pain syndrome, three poorly understood, controversial, and overlapping syndromes. The frequent prevalence of these disorders in association with Lyme disease and other medical and psychiatric illness was emphasized. New studies demonstrated the potential role for central nervous system activation in fibromyalgia and chronic fatigue syndrome.