Figure 3: (A) 28-year-old male patient presented with history of backache for 6 months duration. MRI of Lumbar spine showed irregularity of the vertebral endplates on T2 W image (a) with enhancement on post contrast T1 (b) of the intervertebral disc at L1-L2 levels (blue arrows). CT (c and d) confirmed the bamboo-spine like appearance, decreased density of the bones, syndesmophytes, facetal arthropathy and irregularity of bilateral sacroiliac joints (black arrows). Lab investigations also supported the diagnosis of ankylosing spondylitis. (B) 40-year-old lady presented with of neck pain for 3 months. MRI showed pannus at the level of C1-2; isointense on T2 (a) and T1 W images (not shown), and showed enhancement on post contrast T1 image (arrows in b). On CT (c and d), there was evidence of bony ankylosis involving the atlantoaxial and atlanto-occipital joints. Lab investigations complimented the diagnosis of RA