In prostate cancer, the expression of iNOS was related to tumor cell proliferation.46 In breast cancer, iNOS and NO can stimulate the expression of ERBB2 and bFGF and promote the proliferation of breast cancer cells.47 In cervical cancer, iNOS expression was positively correlated with tumor clinical stage, malignant degree, distant metastasis, and tumor microvessel density. The gene discussed is ERBB2; the disease is breast cancer.