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©2013 UpToDate ® Print Email Cardiac allograft vasculopathy lesion types Anatomic abnormalities in transplant coronary vascular disease. Type A lesion: discrete, tubular or multiple stenoses. Type B 1 lesion: abrupt onset with distal diffuse concentric narrowing and obliterated vessels. Type B 2 lesion: gradual, concentric tapering with distal portion having some residual lumen. Type C lesion: narrowed irregular distal branches with terminations that are often nontapered and squared off, ending abruptly. Reproduced from: Gao, SZ, Alderman, EL, Schroeder, JS, et al. Accelerated coronary vascular disease in the heart transplant patient: coronary arteriographic findings. J Am Coll Cardiol 1988; 12:334. Illustration used with the permission of Elsevier Inc. All rights reserved.