Reason: having pain in groin, and perianal area History: having pain in groin and perianal area Lumbar MRI is good There is increased signal abnormality on fluid sensitive sequences within the right gluteus maximus muscle. There is a 1.7 x 1.0 cm focus of fluid signal intensity with associated peripheral enhancement on postcontrast sequences (image 28; series 10). There is nonspecific enhancing subcutaneous edema along the posterior aspect of the right hemipelvis in the surrounding area. There is perhaps minimal skin thickening in the overlying area. No bone marrow signal abnormalities are identified. The imaged musculature of the pelvis is otherwise unremarkable. There is a small amount of fluid within the hips which is not necessarily of any clinical significance. The prostate appears enlarged. Mild osteoarthritis affects the hips. Mild degenerative disc disease affects the imaged lower lumbar spine.
Enhancing signal abnormality within the right gluteus medius maximus and enhancing overlying subcutaneous edema. There is a 1.7 cm focus of peripherally enhancing fluid signal abnormality along the posteromedial aspect of the right gluteus maximus muscle as described above. These findings are suspicious for inflammatory change/myositis with small abscess formation in the correct clinical context. Alternatively, these could represent a muscle strain with interstitial tearing, particularly if there is a history of trauma.