摘要: A 27-year-old male presented with thickening and hardening of all his 20 nails palmoplantar keratoderma started at 8-month age (Figs. 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7). His teeth were present birth he had no leukokeratosis oral mucosa, eye involvement.