In Week 25 of Derm Boot Camp, we take a closer look at some of the most clinically nuanced and high-yield dermatologic conditions. This episode covers rashes around the mouth, including key differentials and management strategies for perioral presentations you can’t afford to miss. We then dive into cutaneous T-cell lymphoma (CTCL) — recognizing early findings, understanding diagnostic pitfalls, and knowing when to escalate care. Finally, we explore diseases of the mucous membranes, breaking down inflammatory, autoimmune, and neoplastic processes.