TY - CHAP M1 - Book, Section TI - Pathology of Skin Lesions A1 - Elenitsas, Rosalie A1 - Chu, Emily Y. A2 - Kang, Sewon A2 - Amagai, Masayuki A2 - Bruckner, Anna L. A2 - Enk, Alexander H. A2 - Margolis, David J. A2 - McMichael, Amy J. A2 - Orringer, Jeffrey S. Y1 - 2019 N1 - T2 - Fitzpatrick's Dermatology, 9e AB - AT-A-GLANCEDifferent tissue compartments interconnect anatomically and interact functionally. These are the reactive units of the skin.The superficial reaction unit comprises the epidermis, the junctional zone, and the papillary body with its vascular system.The reticular dermis with the deeper dermal vascular plexus is the second reactive unit.The third reactive unit is the subcutaneous tissue with its septal and lobular compartments.Hair follicles and glands are a fourth reactive unit embedded into these three units.Pathologic processes may involve these reactive units alone or several of them together in a concerted fashion.The heterogeneity and interaction of these individual cutaneous compartments explains why a few basic pathologic reactions lead to a multiplicity of clinical and pathologic reaction patterns. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/16 UR - accessmedicine.mhmedical.com/content.aspx?aid=1161320385 ER -