An active Romanus lesion is seen on the anterior vertebral edge of L2 depicted as reduced signal intensity on T1WI images and increased signal intensity on STIR images representing bone marrow edema. There is another small Romanus lesion seen on the inferior portion of the posterior vertebral edge of T11. Signs of bilateral sacroiliitis are also seen and are depicted as increased signal intensity on coronal STIR images seen predominantly on the left sacroiliac joint indicating an active inflammatory lesion. The right sacroiliac joint better represents a chronic inflammatory lesion depicted as areas of low signal intensity on STIR and T1WI images consistent with subchondral sclerosis with associated erosion seen as a reduced intensity bony defect of the iliac portion of the sacroiliac joint on coronal STIR images.