A 33-year-old used to walk 2km three times per week until 3 years ago when he started to complain of right hip pain. He has been exercising since he started school and attributed his pain to early arthritis. The hip pain was provoked by exercise and radiated to the right popliteal fossa. The right hip pain gradually increased to the point that he stopped performing any vigorous physical activity. Physical examination Stable vital signs (VSS). There was a pain on flexion combined with the medial rotation of the right hip. Otherwise, the examination was normal.
Diagnostic tests An X-rays of the hip. The X-rays of the pelvis and the right hip were normal. There was no fracture or osteoarthritis. The MRI of the hip and lower back was also negative. Arthritis is less likely in such a young patient with a generally unremarkable physical examination. Then what is the likely diagnosis? What is…
