@article {Gran368, author = {J T Gran and G Husby and M Hordvik}, title = {Spinal ankylosing spondylitis: a variant form of ankylosing spondylitis or a distinct disease entity?}, volume = {44}, number = {6}, pages = {368--371}, year = {1985}, doi = {10.1136/ard.44.6.368}, publisher = {BMJ Publishing Group Ltd}, abstract = {In a population survey of ankylosing spondylitis (AS) seven subjects, six males and one female, had x-ray changes in the lumbar spine typical of AS but without concomitant roentgenological sacroiliitis. The overall prevalence of such cases in the population studied was 0.37\%. Four out of these seven subjects carried the tissue antigen HLA-B27 (57\%). The clinical and roentgenological features of these subjects are described and it is suggested that the x-ray findings represent a mild and variant form of primary or definite AS.}, issn = {0003-4967}, URL = {https://ard.bmj.com/content/44/6/368}, eprint = {https://ard.bmj.com/content/44/6/368.full.pdf}, journal = {Annals of the Rheumatic Diseases} }