Hazelrigg D E, Duncan W C, Jarratt M
Arch Dermatol. 1977 Jan;113(1):73-5.
Twenty-nail dystrophy is an idiopathic nail dystrophy that begins insidiously in early childhood. All 20 nails are uniformly affected with excessive longitudinal striations and loss of nail luster. The skin and its ectodermal derivatives are otherwise normal. Twenty-nail dystrophy is believed to be a self-limited abnormality that resolves slowly with age.
二十甲营养不良是一种特发性甲营养不良，于儿童早期隐匿起病。20个指甲均一受累，出现过多的纵向条纹和甲光泽丧失。皮肤及其外胚层衍生物无其他异常。二十甲营养不良被认为是一种自限性异常，会随着年龄增长而缓慢缓解。
