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Keratoacanthoma associated to cutaneous horn manifestation: case report and difficulty of diagnosis

Marina Curra, Marco Antonio Trevizani Martins, Laura Campos Hildebrand, Maria Cristina Munerato, Manoel Sant'Ana Filho, Manoela Domingues Martins

Abstract


Background: Cutaneous horn (CH) is a conical hyperkatotic projection of skin with keratotic material. A broad variety of lesions may be found with clinical aspect of cutaneous horn, including malignant tumors.  Case report: We report a case of patient with 77- year-old male, presenting an asymptomatic lesion with clinical aspect of CH in lower lip. The clinical diagnosis hypothesis was squamous cell carcinoma (SCC) and an incisional biopsy was performed. The histopathological analysis revealed a keratoacantoma (KA) and the lesion was completely removed. The one year follow-up revealed no recurrence. Discussion: CH rarely is accompanied by KA. However, KA shows a greater degree of nuclear atypia than SCC making the differentiation of two diseases very difficult. This case highligh the importance of histopathological examination to rule out malignancy.


Keywords


Neoplasms; Keratoacanthoma; Squamous Cell Carcinoma

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DOI: http://dx.doi.org/10.11606/issn.2357-8041.clrd.2015.123074

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Copyright (c) 2017 Manoela Domingues Martins, Marina Curra, Marco Antonio Trevizani Martins, Laura Campos Hildebrand, Maria Cristina Munerato, Manoel Sant'Ana Filho

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.