Inproceedings: an article in a conference proceedings.
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A strange foot not far from CRPS I
Title of the conference
SOFMER 2011, 26e congrès de la Société Française de Médecine Physique et de Réadaptation
Nantes, France, 13-15 octobre 2011
Annals of Physical and Rehabilitation Medicine
Introduction.- Since the work of the "International Association for the Study of Pain" (IASP), complex regional pain syndrome type 1 (CRPS I) or algodystrophy includes motor disorders (tremor, dystony, myoclony) as diagnosis criterion. This can lead to confusion with some neurologic disorders which can wrongly be considered as CRPS I. The following observation illustrates this problem.Observation.- A 31-year-old man was hospitalised in a rehabilitation clinic in April 2007 with suspected CRPS I with persistent pain in the left leg. In 2005, the patient underwent ligament reconstruction at the right ankle. In May 2006, a recurrence of his ankle sprain was treated conservatively. The course of this pathology was unfavourable with an extension of the pain areas (leg and foot) as well as an appearance of abnormal motion. Toe motion in abduction was observed (especially T5) followed by a flexion cramp; an hypoesthesia in the sural nerve area, a scar allodynia and discrete vasomotor disorders. The scintigraphy was compatible with a stage 2 algodystrophy. Lower limb electromyography was normal; measurement of pseudo periodic activity of the motor unit at the foot level (abductor of the 5th toe, 4th interosseous). A "Painful legs and moving toes syndrome" was diagnosed which was treated with gabapentin and carbamazepine with a partial improvement.Discussion.- The "Painful legs and moving toes syndrome" is a rare pathology rehabilitation specialists should recognize. The origin is often peripheral nerve damage. The medullar interneuron activation (between the dorsal and ventral horn) is considered as the source of the efferent motor nerves which are responsible for the abnormal movements. This observation illustrates the need for a demanding approach before establishing the diagnosis of CRPS I and the respect of the 4th criterion of the ASP (exclusion of this syndrome when another pathology may explain pain and dysfunction).
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