新生児における孤発性先天性爪甲形成不全および爪甲全欠損症：稀な症例

Congenital hyponychia and anonychia are extremely rare nail disorders characterized by the partial or complete absence of nails. These conditions may be inherited or associated with in utero exposure to teratogenic substances. A full-term male neonate underwent routine head-to-toe examination in the labor room. The baby was noted to have both incomplete (hyponychia) and complete (anonychia) absence of fingernails and toenails. No other systemic abnormalities were identified. Isolated congenital hyponychia and anonychia are uncommon findings in neonates. In the absence of syndromic features, the condition generally carries an excellent prognosis.