**1. Introduction**

Among the chapters in this monograph are those that examine the treatment of fibromyalgia syndrome (FMS) using nonpharmacologic natural products and other relatively novel agents [1–3]. Although the modes of therapy described are diverse, a role for disordered immune mechanisms is implicit in each of the three chapters. These include reference to sulfur springs considered to inhibit interleukin-2 and interferon-gamma [1], introductory explanations of FMS pathogenesis that invokes inflammatory dysfunction [2], and mention of inflammatory cytokine production associated with autonomic nervous system dysfunction-stimulated microglial and astrocyte cell activation [3]. The discussion in the fourth chapter about the impact of FMS on the evaluation of inflammatory diseases assumes the opposite that clinically significant inflammation is not a feature of FMS [4].
