Excerpt
A 72-year-old woman with chondrocalcinosis underwent arthroscopy for lavage and release of loose bodies. A severe loss of cartilage on femorotibial joint with massive degeneration and autolysis of medial meniscus were observed by arthroscopy (Figure 1). The ultrasound confirmed advanced osteoarthritis and showed an extrusion of medial meniscus. It appeared as rounded hyperechoic structure that projected out of tibial plateau and femoral condyle. A luxated meniscus more than 3 mm from tibial plateau is called meniscal extrusion, well known in arthritic knees1,2. The key point in this case is that chondrocalcinosis can explain a severe loss of hyaline cartilage leading…