Giant cutaneous horn on the lower lip
Pinto-Almeida, T.; Oliveira, A.; da Cunha Velho, G.ór.; Alves, R.ár.; Caetano, M.ón.; Selores, M.
Dermatology Online Journal 17(12): 10
2011
ISSN/ISBN: 1087-2108 PMID: 22233746 Document Number: 651391
Cutaneous horn is a conical hyperkeratotic projection of the skin composed of compact keratin. A wide range of pathologic conditions may be found at its base, including a significant proportion of malignant tumors. A notable, giant cutaneous horn uncovering a keratoacanthoma/well-differentiated squamous cell carcinoma is presented, highlighting the importance of histopathological examination to rule out malignancy because clinical features cannot assure a correct diagnosis.