Eccrine acrospiroma (syn.: nodular hidradenoma, clear cell hidradenoma, syringoepithelioma, solid-cystic hidradenoma, clear cell eccrine adenoma) is usually a solitary intradermal, exophytic or mixed node with a diameter of 0.5-2 cm or more, hemispherical in shape, dense elastic consistency, on a wide base, covered with unchanged skin, sometimes ulcerating.