The Pathophysiology of Primary Hip Osteoarthritis may Originate from Bone Alterations
A 67-year-old woman, 166 cm tall and weighing 57 kg, visited our hospital very recently. Her pain in the right hip joint started during gait without any episode. Plain radiographs showed a KL grading of 0 in the right hip (KL grading 0, Fig. ). ROM in the right hip joint was full. A week after the onset of pain, hip MRI revealed femoral-lateral local bone alterations in the right hip joint (Fig. , ). More joint space narrowing was seen in the right hip on a plain radiograph (KL grading I, Fig. ). Her right hip pain is currently much reduced.