Reason: please evaluate for possible soft tissue abscess located in post hip s/p revision left THA History: post hip mass with pain ARTICULAR CARTILAGE AND BONE: Metallic susceptibility artifact from the patient's left total hip arthroplasty device limits evaluation of the surrounding soft tissues of the left hip. No bone marrow signal abnormality is identified.SOFT TISSUES: Evaluation for abscess formation is limited on this noncontrast examination. Within this limitation, there is an encapsulated collection demonstrating fluid signal intensity within the subcutaneous tissues along the posterior and superior aspect of the inferior gluteal crease, measuring approximately 5.3 x 2.1 x 5.4 cm, likely representing abscess formation (image 37; series 4). Additionally, there is a moderate amount of fluid surrounding the superior and lateral aspect of the femoral component of the total hip arthroplasty device indicating an effusion. While this may be related to the patient's stated history of recent arthroplasty revision, superimposed infection cannot be excluded and clinical correlation is indicated.ADDITIONAL
1. Moderate-sized joint effusion particularly about the superolateral aspect of the femoral component. While this may be postsurgical in etiology, superimposed infection cannot be excluded and clinical correlation is indicated.2. 5.4 cm encapsulated fluid collection along the superior aspect of the inferior gluteal crease, on the right, likely representing abscess formation, within the limitations of this noncontrast examination. Other findings as described above.