ALGODYSTROPHY: A COMMON UNRECOGNIZED CAUSE OF CHRONIC KNEE PAIN |
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| Authors: | COUGHLAN, R. J. HAZLEMAN, B. L. THOMAS, D. P. PAGE SATTELLE, L. CRISP, A. J. JENNER, J. R. DANDY, D. J. |
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| Affiliation: | Rheumatology Research Unit and Department of Orthopaedic Surgery Addenbrooke's Hospital, Cambridge CB2 2QQ, UK |
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| Abstract: | Thirty-three patients with undiagnosed chronic knee pain hadfeatures of autonomic disturbance. Thermography is a usefulimaging technique for demonstrating this abnormality. The patientslacked the thermographic symmetry observed in 16 normal controlsbut this returned with resolution of the pain. Recognized radiologicaland scintigraphic features of algodystrophy were found. Thelong duration of symptoms, high proportion of young femalesand the severity of the associated disability were notable.It is suggested that algodystrophy is a more frequent causeof chronic knee pain than previously recognized. Autonomic abnormalitiesmay be less intense in disease at this site, particularly inyoung females and may be overlooked. This characteristic ofalgodystrophy of the knee may contribute to chronicity and subsequentdisability. KEY WORDS: Algodystrophy, Sudecks atrophy, Reflex sympathetic dystrophy, Knee, Autonomic nervous system |
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