Giant cutaneous horn on the lower lip

Pinto-Almeida, T.; Oliveira, A.; Velho, G.; Alves, R.; Caetano, M.; Selores, M.

http://hdl.handle.net/10400.16/1662

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Abstract(s)

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.