Further characterization using immunohistochemistry (IHC) showed that the tumor cells were positive for leucocyte common antigen (LCA), CD3, and CD30 (uniform diffuse positivity in Golgi region in more than 75% of cells) but negative for pan cytokeratin, CD20, ALK, and epithelial membrane antigen (EMA). The gene discussed is MUC1; the disease is neoplasm.