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Table 2 Histology score

From: Human multipotent mesenchymal stem cells improve healing after collagenase tendon injury in the rat

Variable Score and criteria
Linearity of the fiber structure 1 = no linear areas
2 = 20-50% linear
3 = ˃ 50% linear
4 = linear (normal)
Shape of the tendon cells 1 = predominantly round
2 = moderately round
3 = slightly oval
4 = linear (normal)
Density of the tendon cells 1 = sheets of cells
2 = moderate increase
3 = slight increase
4 = sparse(normal)
Inflammation (leucocyte deposits in the endotenon and epitenon) 1 = severe increase
2 = moderate increase
3 = slight increase
4 = none
Hemorrhage 1 = predominant hemorrhage
2 = multiply areas in each field
3 = sparse or patchy
4 = none
Thickness of the epitenon 1 = massive fibrosis
2 = 7–15 cells
3 = 3–6 cells
4 = 1–2 cells