Review and Prospects of Palmoplantar Keratosis: Focusing on the History of Nagashima-Type Palmoplantar Keratosis
History and Prospects of Nagashima-Type Palmoplantar Keratosis Background Palmoplantar keratoderma (PPK) is a group of hereditary or inflammatory skin disorders characterized by hyperkeratosis of the palms and soles, with diverse clinical manifestations and complex diagnostic criteria. Nagashima-type palmoplantar keratosis (NPPK) is the most common...