33 year old female 2 weeks status post left hip arthroscopy. Assess for source of infection. There is a defect within the anterior aspect of the femoral head with underlying signal abnormality and enhancement; while it is impossible to exclude osteomyelitis, we suspect that this simply reflects changes from a surgical decompression procedure. The remaining bone marrow signal is normal. There is a small joint effusion as well as enhancement of the synovium of the hip; while we cannot exclude the possibility of infection, this also may be postoperative in etiology. Mild increased signal intensity of the hip fluid on T1-weighted images in relation to the skeletal muscle may represent blood products. A defect in the anterior capsule of the hip presumably reflects prior surgery. There is a defect in the iliotibial band at and below the level of the greater trochanter that is presumably postoperative in etiology. Within this defect there is a lobulated collection of heterogeneous signal intensity measuring approximately 6.0 cm x 3.0 cm x 4.0 cm. It contains foci of increased signal intensity on T1-weighted images which suggests subacute blood products and shows only mild peripheral enhancement post gadolinium administration; findings compatible with hematoma. There is mild edema and enhancement of the underlying anterior and lateral musculature of the hip suggesting mild inflammation. There is a small amount of fluid and enhancement along the posterior aspect of the greater trochanter suggesting mild bursitis. There is a bandlike signal abnormality of the anterolateral subcutaneous fat likely representing a surgical scar. The iliopsoas tendon is discontinuous as it courses along the anterior aspect of the acetabulum which we also presume is postoperative in etiology. Please note that this study was not protocolled for detailed evaluation of the acetabular labrum or articular cartilage of the hip. Small amount of free fluid in the pelvis.
Postoperative changes as described above. Small amount of fluid and synovial enhancement within the left hip may simply be postoperative in etiology, although it is impossible to exclude infection on the basis of this study.