Poststreptococcal Movement Disorders
The spectrum of “poststreptococcal” movement disorders and other behavioral abnormalities has expaanded and the array of neuropsychiatric features associated with rheumatic fever (RF) has been broadened. However, it is difficult to establish a causal link between Group A Streptococcus (GAS) and neuropsychiatric symptoms beyond RF, which has fuelled a long-lasting, and still unsolved, debate as to whether putative “poststreptococcal” disorders such as the PANDAS (Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infection) phenotype are distinct entities or not. This chapter provides an up-to-date overview of the conditions that are well established (Sydenham’s chorea) or proposed (poststreptococcal tic and obsessive-compulsive disorders) as secondary to an immune response toward GAS.