Recent studies show increased angiogenesis in ovarian cancer due to the overexpression of the DLX4 homeobox gene 50 and cancer growth in ovarian high‐grade serous carcinoma due to reduced expression of PDZ‐LIM domain‐containing protein 2 (a cancer growth repressor) 51 following increased iNOS‐derived nitric oxide. The gene discussed is NOS2; the disease is cancer.