Patients with palmoplantar pustulosis (PPP) have an overlapping comorbidity profile with patients with psoriasis vulgaris, according to a study published in JAMA Dermatology. Dong Hyo Kim, M.D., from the Seoul National University College of Medicine in South Korea, and colleagues conducted a nationwide population-based cross-sectional study involving Korean patients diagnosed with PPP, psoriasis vulgaris, or...