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Fig. 1 | Arthritis Research & Therapy

Fig. 1

From: Evidence for the presence of synovial sheaths surrounding the extensor tendons at the metacarpophalangeal joints: a microscopy study

Fig. 1

Histological and immunohistochemical evaluation of transverse sections near MCP3 through the extensor tendon. A HE-stained transverse section from the level indicated in B. T, extensor tendon; S, skin; O, location of ossa digitorum of the distal phalanx (removed from tissue block). C An enlargement of the HE-stained transverse section indicated by the C-box in A. T, extensor tendon. D Enlargements of adjacent transverse sections indicated by the D-boxes in A, with immunohistochemical staining for CD68, CD55 and cadherin-11. Arrows in panel D1: dorsal to the extensor tendon, a thin layer of tissue with expression of CD68, CD55 and cadherin-11 was present. Arrow in panel D2: in the tissue at the palmar aspect of the tendon some scattered macrophages were detected. There was no cadherin-11 expression, while CD55 was widely expressed, consistent with scattered fibroblasts

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Arthritis Research & Therapy

ISSN: 1478-6362

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