Cardiac allograft vasculopathy lesion types

Anatomic abnormalities in transplant coronary vascular disease.
Type A lesion: Discrete, tubular, or multiple stenoses.
Type B₁ lesion: Abrupt onset with distal diffuse concentric narrowing and obliterated vessels.
Type B₂ 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.