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Differential Diagnosis of a Facial Rash in Dermatology

The transcript teaches a clinical reasoning framework for differential diagnosis in dermatology, in which a set of candidate diagnoses is generated and provisionally retained based on how well a patient's history and physical exam findings match the known epidemiology, risk factors, and characteristic features of each condition. It also reviews the functional anatomy of skin glands, distinguishing sebaceous glands (producing sebum, an oily lubricating and waterproofing secretion released into hair follicles) from eccrine and apocrine glands (sweat-producing glands secreting onto the skin surface or into hair follicles).