(A) T1-weighted SEMAC-VAT image, of a 48-year-old female who underwent bilateral THA, showing a cystic lesion with an intermediate signal that is close to the greater trochanter bursa (white arrow) (B) In the T2-weighted TIRM SEMAC-VAT image of a 48-year-old female who underwent bilateral THA, the lesion had a high signal (white arrow) (C) DR image, of a 48-year-old female who underwent bilateral THA, showing a radiolucent band surrounding the acetabular cup (black arrow head). This was not confirmed by the SEMAC-VAT MR image, which suggests osteoporosis (D) Pathological findings showing the infiltration of lymphocytes, plasma cells and neutrophils, which supports the diagnosis of chronic synovitis. DR = digital radiography; SEMAC-VAT = slice-encoding metal artifact correction and view-angle tilting; THA = total hip arthroplasty; TIRM = turbo inversion recovery magnitude.