Cancers originating in bone, known as primary bone cancers, are rare. They usually develop in children and teen-agers. The causes are unknown, but some cases are associated with genetic factors. The most common site of primary bone cancer is the leg, either just above or just below the knee. The......

Bursae act as friction-reducing cushions around joints. Inflammation of a bursa, called bursitis, may occur if it is put under prolonged or repeated stress. The bursa becomes tender and swollen, and movement of the joint is restricted. The knee is most commonly affected, especially as a result of......

In Dupuytren’s contracture, the fibrous tissue in the palm of the hand becomes thickened and shortened. As a result, one or more fingers, often the fourth and fifth fingers, are pulled towards the palm into a bent position. Sometimes, painful lumps develop on the palm, and the overlying skin becomes......

Uterine polyps are painless growths that are attached to the cervix or to the inside of the uterus. The polyps may occur singly or in groups and vary in length up to about 3 cm (1in). Polyps are usually harmless, but they may become cancerous in rare cases. Uterine polyps are common, especially in pre-menopausal......