Linear Cowden nevus, also known as linear PTEN nevus, is a type of epidermal nevus, first described in 2007, which is seen in patients with PTEN hamartoma tumor syndrome. It is considered to be a type 2 form of segmental mosaicism, and we suggest that it has certain clinical features that distinguish it from epidermal nevi seen in similar conditions, such as Proteus syndrome. We present a case of linear Cowden nevus in a 4-year-old boy and review the literature.

中文翻译：

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疣状表皮痣是 Cowden 综合征 2 型马赛克 PTEN 突变的表现

线状考登痣，又称线状 PTEN 痣，是表皮痣的一种，于 2007 年首次描述，见于 PTEN 错构瘤综合征患者。它被认为是节段性嵌合体的 2 型形式，我们认为它具有某些临床特征，可将其与类似情况下的表皮痣区分开来，例如变形杆菌综合征。我们介绍了一例 4 岁男孩的线状考登痣，并回顾了文献。