Keratoacanthoma generally occurs on the skin; it is rarely found in the conjunctiva. A case of a 34-year-old woman with a rapidly growing conjunctival mass is reported. The tumor was excised with a safety margin to exclude squamous cell carcinoma. Histopathologically it was crateriform and consistent with atypical keratoacanthoma. There has been no recurrence in 2 years of follow-up. Conjunctival keratoacanthoma is rare; differential diagnosis of conventional squamous cell carcinoma and keratoacanthoma can be difficult. We recommend complete surgical excision and careful follow-up of crateriform squamous proliferations.
Recebido em 4/3/99 Aceito para publicação em 17/11/99 Trabalho realizado no Serviço de Cirurgia Geral do Hospital Geral de Fortaleza. DISCUSSÃO Cisto do mesentério foi primeiramente descrito em 1507 (apud Liew) pelo anatomista Benevienae. A primeira excisão foi realizada por Tillaux (apud Chung) somente em 1880 2. Apesar do longo tempo do reconhecimento desta enfermidade, sua origem, classificação e patologia permanecem controversas. A maior incidência encontrase entre a terceira e quarta décadas de vida, sendo 75% dos casos diagnosticados após os 10 anos de idade 2,3 , com discreto predomínio do sexo feminino 1 .
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