Fig. (2) Examples of focal damage to the tibial cartilage induced by meniscus. The arrow in (a) indicates a small mid-anterior meniscal projection of a medial control meniscus; (c) shows the lesion on the medial control tibial condyle induced by the meniscal projection. The arrow in (b) points to a partial horizontal tear in a 3-week medial meniscus; (d) is the medial tibial lesion of a 3-week medial tibia induced directly beneath the partial horizontal meniscal tear.