Reason: h/o sacral osteomyelitis still on antibiotics. Also with prostate ca History: pain Again seen is enhancement of the left sacroiliac joint indicating sacroiliitis, compatible with the stated history of infection. Small erosions are again noted about the left sacroiliac joint, appearing similar to the prior study, but the degree of edema and enhancement of the adjacent ilium and sacrum has decreased when compared to the prior study. The edema and enhancement of the adjacent musculature has likewise decreased when compared to the prior examination. There is low signal intensity on the T1-weighted images along the iliac margin of the joint likely representing sclerosis. The bone marrow signal intensity is otherwise normal in appearance. Please note that the study was not protocoled for dedicated evaluation of the prostate gland; however the prostate gland appears similar to the prior study.
Findings compatible with left sacroiliac joint inflammation with interval decrease in inflammation of the adjacent bone and soft tissue structures.