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Logo of annrheumdAnnals of the Rheumatic DiseasesCurrent TOCInstructions for authors
Ann Rheum Dis. Sep 2001; 60(9): 901–902.
PMCID: PMC1753830

Ultrasonography is useful to distinguish between intra- and extra-articular disease in pyoderma gangrenosum complicating polyarthritis

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Figure 1
Ultrasonography of the distal pretibial region: the normal right leg (left) and echo-poor areas (arrow) in the left leg (right). a = position of the transducer at the skin surface; b = bone of the tibia.

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