Syringoacanthoma. Acanthotic lesion of the acrosyringium.

An acanthotic and papillomatous cutaneous lesion with a seborrheic verruca (keratosis)-like clinical appearance that, under light microscope examination, shows intermingling of sweat ductal and epidermal cells is described. Other lesions related to the distal end of the eccrine sweat duct have been recorded before, but these lesions, named syringoacanthoma herein, have not been described previously, to my knowledge. Twenty-one cases of syringoacanthoma , 12 benign and nine malignant, are reviewed and their relationship with similar lesions is discussed.