Requirements for a Good Diagnostic Result.- The Dermal Blood Vasculature.- The Dermal Lymphatic Vasculature.- The Immune Response.- Cell and Vascular Response to Infection and Injury.- Cell Death in the Living Body.- Vasculitis.- Skin Lesions due to Abnormalities in Blood Components.- Arteriosclerosis in the Skin.- Thromboangiitis Obliterans.- Angiotropic Lymphoma.- Infections Caused by Common Pyogenic Bacteria.- Common Fungal Infections.- Demodicidosis.- Infections Caused by Mycobacterium Tuberculosis, M. Bovis, and Atypical Mycobacteria.- Leprosy.- Syphilis.- Lyme Borreliosis.- Leishmaniasis.- Herpes Simplex, Herpes Zoster/Varicella, and Cytomegalovirus Infections.- Langerhans Cell Histiocytosis in Skin and Mucous Membranes.- Dermatitis (Eczema).- Psoriasis.- Lichen Planus and Lichen Nitidus.- Autoimmune Vesicular, Bullous, and Pustular Dermatoses.- Recurrent Vesicular Eruptions.- Profiles of the Epidermal/Dermal Area in some Vesicular/Bullous Dermatoses.- Skin Lesions Due to Drugs.-Artifacts.