A tumor, such as a dermatofibroma, causes consternation among many patients, but it rarely creates problems on its own. Also called a histiocytoma, it remains one of the most common mesenchymal growths. Its etiology is unknown with the previous theory that it is a dermal response to injury, such as an insect bite, being challenged. As much as patients like to blame spiders or other arthropods for traumatizing an arm or leg, no definitive explanation is available for its etiology.
Recommended CitationParish, Lawrence; Yazdanian, Shideh; Lambert, W Clark; and Lambert, Peter C, "Dermatofibroma: a curious tumor." (2012). Department of Dermatology and Cutaneous Biology Faculty Papers. Paper 26.