This Commentary refers to the following articles:
Association between Urinary Prostaglandin E2 Metabolite and Breast Cancer Risk: A Prospective, Case–Cohort Study of Postmenopausal Women
Sangmi Kim, Jack A. Taylor, Ginger L. Milne, and Dale P. Sandler and
Increased Levels of Urinary PGE-M, a Biomarker of Inflammation, Occur in Association with Obesity, Aging, and Lung Metastases in Patients with Breast Cancer
Patrick G. Morris, Xi Kathy Zhou, Ginger L. Milne, Daniel Goldstein, Laura C. Hawks, Chau T. Dang, Shanu Modi, Monica N. Fornier, Clifford A. Hudis, and Andrew J. Dannenberg