What is the medical term for small outgrowths of epidermal and dermal tissue commonly known as skin tags?

The medical term for small outgrowths of epidermal and dermal tissue known as skin tags is acrochordon. Skin tags are benign tumors that often occur in areas where the skin folds, such as the neck, armpits, or groin. They are generally harmless and typically appear as small, soft, and flesh-colored growths. Acrochordons are composed of both epidermal and dermal components, which contributes to their characteristic appearance and texture.

Other terms listed, such as dermatofibroma, keratoacanthoma, and keloid, refer to different skin conditions. Dermatofibromas are firm, raised nodules that usually occur on the legs and arms, keratoacanthomas are fast-growing tumors resembling squamous cell carcinoma, and keloids are raised scars that extend beyond the original injury site. Each of these has distinct characteristics and underlying causes, making acrochordon the correct terminology for the skin tags described in the question.