Giant solitary trichoepithelioma is a cutaneous condition characterized by a skin lesion that may be up to several centimetres in diameter.

[1]: 672 Giant solitary trichoepithelioma primarily affects the perianal and groin region.

[2] They typically measure a few centimeters in diameter and rarely reach 2 to 3 cm.

[3] Giant solitary trichoepithelioma is distinguished histologically by a dermal or subcutaneous tumor made up of basophilic cells grouped in solid, adenoid, or lace-like clusters.

Papillary bodies and trichilemmal keratinization in horn cysts are indicative of a solid diagnosis, however they are not always present.