This chapter covers the general aspects regarding the mechanisms of the
four specific branches of iatrogenic immunopathology: iatrogenic immunodeficiencies,
iatrogenic-induced lymphoproliferative diseases, hypersensitivity-induced lesions and
immunopathology of transplantation. Understanding the four types of hypersensitivity
reactions is mandatory for understanding the details of drug-induced lesions in organs.
Mechanisms and complications of transplantation of solid organs are shown in detail.
Keywords: Adverse drug reaction, Bone marrow, Graft-versus-host disease,
Host-versus-graft disease, Hypersensitivity reactions, Iatrogenic, Immunopathology,
Lymphoid tissue, Lymphoproliferative disease, Rejection, Transplant.