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Modern US equipment allows rheumatologists to directly visualize vascular, musculoskeletal, dermal and internal organ structure. In multisystemic and challenging diseases such as vasculitides and scleroderma, where new outcome measures are required in both clinical practice and trials, US measures promise reproducible and objective scores of disease activity and extension. US reveals early pathognonomic abnormalities and may help start early treatment.
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Porta et al. (2012) studied this question.
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