Male 58 years old with a posterior ilium lesion, check for interval change. BONE MARROW: Again seen is a focus of abnormal signal intensity within the posterior left ilium lateral to the sacroiliac joint. It measures approximately 15 x 10 mm in transverse dimension and 16 mm in craniocaudal dimension similar to the prior study upon remeasurement of the lesion on that study. Signal intensity characteristics are similar to the prior study as well, although the lesion is slightly less conspicuous on the T2 weighted images of the current study than on the prior study. The lesion disrupts the cortex of the lateral ilium but we see no evidence of progression into the soft tissues. We see no additional lesions. The remaining bone marrow signal intensity is normal. The musculature is normal in appearance. There is mild facet joint osteoarthritis lower lumbar spine.
Small left iliac bone lesion as described above. Lack of interval change in size suggests a benign etiology perhaps a small benign cartilage lesion.