Figure 2 | Scientific Reports

Figure 2

From: Medial meniscus extrusion is invariably observed and consistent with tibial osteophyte width in elderly populations: The Bunkyo Health Study

Figure 2

A schematic illustration showing the hypothesis on medial meniscus extrusion (MME) induced by osteophyte formed at the bone-cartilage junction of the medial tibia. Osteophytes are formed in the periosteum at the bone-cartilage junction following endochondral ossification and are thus composed of cartilage and bone parts. The most important anatomical characteristic is that the medial meniscus is tightly attached to the medial tibial plateau by the menisco-tibial ligament (coronary ligament). Therefore, the mechanical stretching force generated during joint movement because of the medial tibial osteophyte may contribute to the displacement of the medial meniscus by pressing the menisco-tibial ligament, leading to MME.

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