Chapter 1: Structure of SkinChapter 2: Types of Lesions in DermatologyChapter 3: Skin Diseases Caused by Protozoa, Arthropods, and Parasitic WormsChapter 4: Cutaneous InfectionsChapter 5: EczemasChapter 6: Genetics and GenodermatosesChapter 7: Vesiculobullous DiseasesChapter 8: Papulosquamous DisordersChapter 9: Disorders of Connective TissueChapter 10: Disorders of Skin AppendagesChapter 11: Disorders of PigmentationChapter 12: Leg Ulcers and other Disorders of Vascular InsufficiencyChapter 13: Urticaria, Mastocytosis, Pruritus, and other Vascular ResponsesChapter 14: Disorders due to Cold, Light, Heat, and RadiationChapter 15: Drug ReactionsChapter 16: Nevi and Skin TumorsChapter 17: Cutaneous Manifestations of Internal DiseasesChapter 18: Miscellaneous Cutaneous DiseasesChapter 19: GlucocorticoidsChapter 20: DermatotherapeuticsChapter 21: Sexually Transmitted InfectionsChapter 22: LeprosyChapter 23: COVID-19 and Mucormycosis