a study was made , in co-operation with several gastroenterology and rheumatology centres , of the clinical and genetic characteristics ( hla b27 ) of 50 patients suffering from both inflammatory bowel disease ( 38 crohn 's disease ( cd ) , 12 ulcerated colitis ( uc ) ) and ankylosing spondylitis ( as ) , the latter diagnosis being established according to the new york criteria .
C0021390
inflammatory bowel disease
C0010346
crohn 's disease