<prompt> 75 yrs female has chronic backache, x-ray spine is shown. What is the most likely diagnosis:-Potts spineOsteoporosisSpondylolisthesisSpondylodiscitis  <response>: Spondylodiscitis - Inflammation of disc along with paradiscal margin and shows slight narrowing the disc space at first in X-rays. It is a very painful condition. Potts spine - occurs in paradiscal area. X-ray shows narrowing of the disc space and erosion of adjacent veebral bodies. Spondylolisthesis - Slipping of one veebra into other. Oblique X-ray view demonstrates Scotty Dog Neck which is pathognomonic Osteoporosis - Patients age and the chronic condition points towards osteoporosis. The given X-ray shows Cod fish fish mouth veebrae which is characteristic of osteoporosis. 