A bone fracture is a medical condition in which there is a break in the continuity of the bone. A fractured ankle can occur in motor vehicle accidents, in a trip and fall, “rolling” or “twisting” of the ankle. Ligaments can also be affected in a fractured ankle. Symptoms may be similar to a dislocation, so it is important to have it checked by a medical professional. Osteoporosis or cancer may increase the risk of fractures.