Endometrial lymphoepitheliomalike carcinoma: absence of Epstein-Barr virus genomes.

The aim of this study was to report a case of primary lymphoepitheliomalike endometrial carcinoma (FIGO stage IB). A 57-year-old woman presented with an endometrial tumor showing the classic clinical and hysteroscopic aspects of endometrial carcinoma. Morphologically, the neoplasm was similar to undifferentiated nasopharyngeal carcinoma (lymphoepithelioma). Immunohistochemistry showed that the tumor cells were cyokeratins and epithelial membrane antigen positive. Leucocyte common antigen, estrogen and progesterone receptors, neuron specific enolase, cromogranin, synaptophysin, and p53 were negative. We did not find evidence of Epstein-Barr virus (EBV) infection using immunohistochemistry and polymerase chain reaction (PCR). We report the third case of an endometrial lymphoepitheliomalike carcinoma (LELC). The patient did not receive chemotherapy and is alive and free of disease 24 month after diagnosis. LELC can occur in the endometrium and in this location may not be associated with EBV infection.