Some knee pain is down to the size of a key piece of cartilage known as the meniscus, according to new insights from Osaka Metropolitian University. The Japan-based scientists said some people are born with a meniscus that is thicker than usual on the outer side of the knee, making it prone to tears and – even if that worst-case outcome does not arise – causing pain and locking and meaning surgery is needed. The meniscus, the size of which can be ascertained by a MRI, cushions the knee joint between the femur and the tibia, making smooth functioning vital. The research was published in the Wil…