Psoriasis is a chronic inflammatory dermatosis that presents with important clinical differences in individuals with darker skin tones. In a large cross-sectional study of more than 6,000 adults in the United States, the overall prevalence of psoriasis was estimated at 1.9 percent. Although prevalence was lower among individuals with darker Fitzpatrick skin types, these patients experienced greater disease severity and quality-of-life burden. This disparity may reflect delaye

Lichen planus (LP) is a chronic, inflammatory dermatosis characterized by T cells targeting basal keratinocytes because of dysregulated cell-mediated immunity, with associations including viral infections, medications, contact allergens, and autoimmune conditions. In individuals with darker skin tones, hypertrophic, pigmentosus, and actinic variants of lichen planus are observed more frequently, suggesting that environmental and pigmentary factors may influence disease expres

Seborrheic dermatitis (SD) is a chronic inflammatory dermatosis affecting sebaceous-rich areas and is among the five most common dermatologic diagnoses in Black individuals. In the general population, SD affects approximately 5 percent of individuals; however, prevalence is higher among African Americans, estimated at 6.5 percent. Skin lipids and colonization with Malassezia species plays a role in disease pathogenesis, with downstream inflammatory effects that can be more pr