Muraoka M, Yoshioka N, Hyodo T
Department of Plastic and Reconstructive Surgery, Osaka City University Medical School, Japan.
Ann Plast Surg. 1996 Feb;36(2):201-5. doi: 10.1097/00000637-199602000-00019.
Congenital ectopic fingernails are extremely rare and only 22 cases were found in domestic and foreign literature during our investigation. In the 22 ectopic fingernail cases collected, small ectopic fingernails were found along side the normal fingernail (dorsal or palm side), in most cases, and extremely rare double nails, which are as large as normal nails, were found on the palm side opposite the normal fingernail in some cases. We encountered a 4-year-old boy with a double fingernail on the right fifth finger and an ectopic fingernail on the left fifth finger. The nail on the palm side, including the fingernail block and nail matrix, was excised from the right fifth finger and the defect was reconstructed with a palm skin flap.
先天性异位指甲极为罕见，在我们的调查中，国内外文献仅发现22例。在所收集的22例异位指甲病例中，多数情况下可见小的异位指甲位于正常指甲旁（背侧或掌侧），少数情况下可见与正常指甲大小相同的极为罕见的双指甲，位于与正常指甲相对的手掌掌侧。我们遇到一名4岁男孩，其右手第五指有双指甲，左手第五指有异位指甲。从右手第五指切除掌侧包括指甲块和甲床的指甲，并用手掌皮瓣修复缺损。
