Fig. 2

a-e A 2.9-year-old male patient (case J). The X-ray and CT results show right acetabular bone destruction, with a low-density shadow and hip subluxation (a, b). MRI shows patchy, slightly long T1 and slightly long T2 signals in the right ischial and iliac bone and long T2 signals in the right hip joint space (c, d). The pathological results suggest chronic inflammatory cell infiltration and granulomatous inflammation with a multinucleated giant cell response (e) (white arrows indicate the site of the lesion)