Porokeratosis (PK) is a clonal disorder of keratinization that is histologically characterized by the presence of a corn摘要PK是一群角化异常的疾病，病理下的特徵是可见所谓的角样板。
Rapid keratinization and the lack of sebaceous glands on hands will cause dryness, roughness, chaps and peeling.手上迅速的角质化和皮脂腺的缺乏会造成干燥、粗糙、皲裂和脱皮。