Fig. 2.
Histological assessment of meniscus integrity: (A, B) Normal meniscus: The meniscus surface is smooth, no fraying or surface fibrillation, score 0. (C, D) Mild changes: The meniscus surface shows slight fibrillation or undulation, score 1. (E, F) Moderate fibrillation, fraying and/or undulation, some clefts are present, score 2. (G, H) The meniscus shows severe fraying and tears, severe disruption, score 3. Safranin O - Fast Green, 4x.