64-year-old female history of OA and RA now with right groin pain. ARTICULAR CARTILAGE AND BONE: Severe osteoarthritis affects the hip with flattening of the femoral head superiorly, bulky osteophytes, and subchondral cysts. There is asymmetric edema type signal within the right femoral head and neck which is nonspecific. While we see no evidence of a discrete fracture, a subchondral stress fracture can have this appearance. Severe osteoarthritis also affects the left hip as seen on the large field-of-view images.ACETABULAR LABRUM: There is diffuse degeneration of the acetabular labrum.SOFT TISSUES: There is fat signal abnormality within the anterior aspect of the right gluteus minimus which may represent focal atrophy or less likely an intramuscular lipoma.ADDITIONAL
Asymmetric edema type signal within the right femoral head/neck may simply be degenerative in etiology, although with the presence of an effusion and mild flattening of the superior aspect of the femoral head, a subchondral stress fracture cannot be entirely excluded; if an acute concern remains suspected.