Carcinoma gástrico de tipo linfoepitelioma: criterios diagnósticos

Gastric lymphoepithelioma-like carcinoma is a rare and poorly characterized condition which historically has not been considered a specific entity, usually being considered synonymous with medullary carcinoma and conventional gastric carcinoma with lymphoid stroma. However, the differentiation of this entity is of clinical and prognostic importance. We report a case of a 77 year old man who presented with a gastric ulcer in the fundus. Histological examination revealed the presence of neoplastic glandular structures with marked lymphoid stroma. The immunohistochemical staining showed strong expression for Epstein-Barr virus and DNA repair proteins with a distinctive lymphoid cell distribution. The aim of our study is to determine criteria useful in the recognition of this unusual condition and assess the inmunophenotype of the lymphoid population.