4. To understand the etiology and histopathology of lupus erythematosus Chapter 15 Bullous Dermatoses 1. To master the pathogenesis, clinical manifestation, histolog ical findings and treatment of pemphigoid 2. To grasp the pathogenesis, clinical classification &manifestation, histological findings and treatment of pemphigus Chapter 16 vitiligo Objective: 1. To master the definition, diagnosis and treatment of vitiligo 2. To grasp the clinical classification and presentation of vitiligo 3. To understand the epidemiology and etiology of vit Chapter 17 Ac Objective 1. To master the classification of acne severity and treatment of acne 2. To grasp the clinical presentation of acne 3. To understand the etiology and pathophysiology and of acne4. To understand the etiology and histopathology of lupus erythematosus. Chapter 15 Bullous Dermatoses Objective: 1. To master the pathogenesis, clinical manifestation, histological findings and treatment of pemphigoid. 2. To grasp the pathogenesis, clinical classification&manifestation, histological findings and treatment of pemphigus. Chapter 16 Vitiligo Objective: 1. To master the definition, diagnosis and treatment of vitiligo. 2. To grasp the clinical classification and presentation of vitiligo. 3. To understand the epidemiology and etiology of vitiligo. Chapter 17 Acne Objective: 1. To master the classification of acne severity and treatment of acne. 2. To grasp the clinical presentation of acne. 3. To understand the etiology and pathophysiology and of acne