Research Article

Early Achilles Enthesis Involvement in a Murine Model of Spondyloarthropathy: Morphological Imaging with Ultrashort Echo-Time Sequences and Ultrasmall Superparamagnetic Iron Oxide (USPIO) Particle Evaluation in Macrophagic Detection

Figure 4

(a) Positive ED1 immunohistochemistry (magnification 200x) in SpA enthesitis in the previous phase. Tissue showing brown macrophages, confirming the efficiency of the model. (b) Negative Perls’ coloration (magnification 200x) in SpA enthesitis in the previous phase in the same rat. Tissue is without blue-green granules (ferric ferrocyanide).
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