Joint Pain Undergoes a Transition in Accordance with Signal Changes of Bones Detected by MRI in Hip Osteoarthritis
A 72-year-old woman, 155.0 cm tall and weighing 57.0 kg with no history of OA visited our hospital. Bilateral hip joint pain started about 5 years ago; since then, bilateral joint pain has improved and worsened repeatedly. She first visited our hospital about 6 months ago and complained of continuous right hip joint pain (P4). Her left hip joint pain has improved (P1). Plain radiographs showed bilateral hip OA of KL grading III (Fig. ). MRI analysis showed no signal changes in the left hip joint, and bone cysts and local signal changes in her right femoral head (Fig. , ).