52-year-old male with pain. Status post right total hip arthroplasty. Evaluation of both hips and the surrounding soft tissue is limited by metallic susceptibility artifact related to the patient's bilateral hip resurfacing arthroplasties. There is a lobulated collection of fluid signal intensity within the right hip joint surrounding the femoral neck in near-circumferential fashion and extending anteriorly into the iliopsoas bursa. The collection has margins of low signal intensity on all sequences which may reflect metal ion deposition. The erosion of the superior aspect of the femoral neck is not as clearly evident on this examination as on recent radiographs and we otherwise see no frank invasion of the bone. The remaining soft tissues of the right hip are within normal limits. There is also a relatively small fluid collection within the left hip which also appears to have a low signal intensity margin which could represent metal ion deposition. We see no frank invasion of bone or surrounding soft tissues. Severe degenerative disc disease affects the level of L4/L5.
1. Fluid collection within the right hip extending into the iliopsoas bursa with a low intensity rim suggesting metal ion deposition. The erosion of the femoral neck seen on prior radiographs is not as clearly seen on today's examination.2. Smaller left hip fluid collection as described above.