ukmla MCQ (SBA): Transient Synovitis (Irritable Hip)

A 5-year-old boy presents with a limp for 1 week. He denies any specific injury. He had an upper respiratory tract infection 2 weeks ago. On examination, he is afebrile. There is reduced range of movement at the right hip, particularly internal rotation and abduction, due to pain. Plain X-rays of the pelvis and hips are normal. What is the most likely diagnosis?