PMC3398294_01
Synovial tissue of the left knee (hematoxylin and eosin staining, x400). A fragment of fibrocollagenous connective tissue stroma admixed with fibrinous exudates and abundant foci of vascular proliferation indicates an inflammatory process.
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F1
During the operation, there was active synovitis of the left knee, and a histopathological examination of the synovial tissue revealed 'rice bodies', which are fibrocollagenous connective tissue stroma admixed with fibrinous exudates and abundant foci of vascular proliferation, suggestive of inflammatory arthritis (Figure 1).