Immunohistochemistry testing demonstrated strong diffuse cytoplasmic positivity for pan-cytokeratin (pan-CK) and focal weak positivity for Epstein-Barr virus latent membrane protein 1 (EBV-LMP-1), consistent with metastasis originating from nasopharyngeal carcinoma. This evidence concerns the gene PDLIM7 and nasopharyngeal carcinoma.