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Alyssa Lebel MD, Charles Berde MD PhD, Laura Chastain, David Borsook MD, Lino Becerra MD
CRPS in pediatric patients has several unique differences from the adult condition. Children can have recurrent episodes after apparent complete resolution of the signs and symptoms, sometimes with and sometimes without any inciting injury. Pediatric patients are unique among individuals with CRPS, as they are generally free of additional complicating neuropathic pain conditions and are developmentally more likely to demonstrate robust neuronal plasticity. CRPS remains, to date, clinically apparent but poorly defined at an anatomic and pathophysiologic level. Imaging of pain in pediatric patients with CRPS may provide a previously unavailable window into the central nervous system changes of challenging chronic pain disorders. Patients (9 - 20 years old) with CRPS affecting the lower extremity were recruited to the study. Subjects had prescanning thresholds measured to determine that the pain stimuli would be tolerable during the scanning. Mechanical stimuli (e.g. cold exposure, brushing) were applied to the affected region of the involved limb and the corresponding mirror region of the unaffected limb.
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