Syringomas are common appendageal tumors of intraepidermal eccrine ducts.

摘要汗管瘤为常见之皮肤附属器官肿瘤，下眼皮及双颊。

Histopathologically, intraepidermal acantholysis is located at the granular layer in PF and suprabasally in PV.

理上，落叶性天表层内棘层松解位颗粒细胞层里，而寻常性天则位在基底层之上。