“…2,3 Ankylosing spondylitis was ruled out by the absence of arthritic disease, by the minimal involvement of the tubular portion of ascending aorta, by extension of the process into the walls of the sinus portion of aorta and onto the bases of the aortic valve cusps, and by the extension of the process onto the anterior mitral leaflet and into the membranous ventricular septum. 4,5 All 23 patients at operation were stated to have 3-cuspid aortic valves that were free of calcific deposits. The free margins, mainly their central portions, were described as being mildly thickened in some patients.…”