Mesalamine, olsalazine, and balsalazide do not contain sulfa. So they may be used to treat mild to moderate ulcerative colitis if you cannot take sulfasalazine. Mesalamine enemas are effective in treating symptoms of mild to moderate distal (left-sided) ulcerative colitis and in maintaining remission.
Medical Definition of ankylosis. plural. ankyloses. \-ËsÄz\play. : stiffness or fixation of a joint by disease or surgery.
1 Ankylosing spondylitis is a form of arthritis featuring chronic inflammation of the spine and the sacroiliac joints.  Ankylosing spondylitis belongs to a group of arthritis conditions that tend to cause chronic inflammation of the spine (spondyloarthropathies).