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Juvenile-onset localized scleroderma activity detection by infrared thermography
G Martini1, K J Murray, K J Howell
1Paediatric Rheumatology Unit, Department of Paediatrics, University of Padova, Italy.
Rheumatology (Oxford, England)
|October 5, 2002
Summary
Infrared thermography shows high sensitivity (92%) for detecting localized scleroderma (LS) disease activity in children. This diagnostic tool is promising when combined with clinical exams, especially for lesions without severe skin atrophy.
Area of Science:
- Dermatology
- Medical Imaging
Background:
- Localized scleroderma (LS) is a chronic inflammatory condition affecting the skin and subcutaneous tissues.
- Accurate assessment of disease activity is crucial for effective treatment and management of LS.
- Infrared thermography (IRT) offers a non-invasive method for evaluating thermal patterns, potentially indicating underlying inflammation.
Purpose of the Study:
- To evaluate the clinical utility and diagnostic accuracy of infrared thermography (IRT) for detecting disease activity in localized scleroderma (LS).
- To assess the reproducibility of IRT in the context of LS lesion evaluation.
Main Methods:
- A retrospective review of 130 thermal images from 40 children diagnosed with LS.
- Calculation of sensitivity and specificity of IRT by comparing thermographs with clinical descriptions of lesions.
- Assessment of IRT reproducibility using the weighted kappa coefficient between two independent clinicians.
Main Results:
- Thermography demonstrated a sensitivity of 92% and a specificity of 68% in detecting LS disease activity.
- High inter-rater reliability was observed, with 91% concordance and a kappa score of 0.82, indicating very high reproducibility.
- IRT is particularly effective for lesions without significant skin or subcutaneous fat atrophy.
Conclusions:
- Infrared thermography is a valuable adjunctive tool for assessing disease activity in localized scleroderma, complementing clinical examinations.
- The technique shows high reproducibility, making it a reliable method for monitoring LS.
- Further research is warranted to explore the potential of IRT in predicting lesion progression.