Oiso Naoki, Kurokawa Ichiro, Tsuruta Daisuke, Narita Tomohiko, Chikugo Takaaki, Tsubura Airo, Kimura Masatomo, Baran Robert, Kawada Akira
Department of Dermatology, Kinki University Faculty of Medicine, Osaka, Japan.
Am J Dermatopathol. 2011 Dec;33(8):841-4. doi: 10.1097/DAD.0b013e3181f96bce.
The nail unit has a unique structure. It has been recently proposed that the nail isthmus as a transitional zone between the most distal part of the nail bed and the hyponychium. A 7-year-old Japanese boy presented with an ectopic nail, an additional and independent miniature nail on the digital pulp of the right fifth finger. We studied the expression of a series of keratin in longitudinal specimens and showed the histopathological manifestation in the nail isthmus. This region in the ectopic nail is subdivided into 2 parts: a proximal and narrow part anchored to the nail plate and a distal and wide part with a semihard keratinized structure.
甲单位具有独特的结构。最近有人提出，甲峡是甲床最远端部分与甲下皮之间的过渡区域。一名7岁日本男孩出现了异位甲，即在右手小指指腹上额外出现的一个独立的微型指甲。我们研究了纵向标本中一系列角蛋白的表达，并展示了甲峡的组织病理学表现。异位甲的这个区域可细分为两部分：近端较窄部分附着于甲板，远端较宽部分具有半硬角质化结构。
