The skin immune system Its cellular constituents and their interactions.

The term immunodermatology describes the systematic investigation of the complex mechanisms of the 'skin immune system' in health and disease. In this review Jan Bos and Martien Kapsenberg discuss the skin's vascular and lymphatic systems and the various cells which participate in the immune response. These include Langerhans' cells, indeterminate cells, veiled cells, endothelial cells, mast cells, tissue macrophages and 'homing' T lymphocytes, which are all present in skin under physiological conditions.