While comprehensive descriptions of the various aspects of Graft-versus-Host Disease (GvHD) have already been published, to date there is no monograph on the clinical and diagnostic pathology of this life-threatening disease. This book fills this gap and serves as a reliable guide to the histomorphologic diagnosis of GvHD. It contains a concise description of: the clinical pathology of GvHD; the applicability and limits of immunohistologic methods in the diagnosis of this disease; an instructive guide to the histological diagnosis; and differential diagnostic problems and potential diagnostic pitfalls.