the reason for ankylosis varied : five patients had previously undergone fusion for posttraumatic arthritis , two patients for tuberculous arthritis , six patients for osteoarthritis , one for a previous old slipped capital femoral epiphysis which had undergone spontaneous fusion after internal fixation , and two patients for ankylosing spondylitis .
C0003090
ankylosis
C0038013
ankylosing spondylitis