Abstract：
Clinical findings in many nail disorders are not usually pathognomonic. An accurate diagnosis therefore relies on inspection of the nail unit from different angles. We review clinical features of different nail disorders that can be observed during frontal examination of the distal edge of the nail plate and the hyponychium and correlate these with features observed when the nail is viewed from above. Frontal examination of the distal nail unit can help establish a clinical diagnosis in routine practice.
摘要：
许多指甲疾病的临床表现通常不是病理性的。因此,准确的诊断依赖于从不同角度检查指甲单元。我们回顾了不同指甲疾病的临床特征，这些特征可以在指甲板远端边缘和甲膜的正面检查中观察到，并将这些特征与从上方观察指甲时观察到的特征相关联。远端钉单元的正面检查可以帮助在常规实践中建立临床诊断。
