Interestingly, while the right pelvic lymph node was positive for metastatic prostatic adenocarcinoma alone, immunohistochemical studies of the left pelvic lymph node revealed a dual metastatic urothelial (cytokeratin-7 and pan-cytokeratin positive, prostate-specific antigen and cytokeratin-20 negative) and prostatic (prostate-specific antigen and pan-cytokeratin positive, cytokeratin-7 and cytokeratin-20 negative) carcinoma. The gene discussed is KRT7; the disease is carcinoma.