My hip surgeon just told me I have a rare form of calcium buildup in the hip that usually is only seen in the shoulder. This was not present when I had arthoscopic hip surgery at the end last Oct 2014 when it was all torn up. The MRI shows it is around the size of a golf ball or so and my bursa hasn t responded to injections for over a year and he will remove that when going in for this calcium deposit and look for any tears in tendons. He could not tell me what has caused this to happen so quickly. John