The policy statement of the American Society of Clinical Oncology (ASCO) emphasizes the growing cancer threat posed by obesity, which is predicted to overtake tobacco as the leading preventable cause of cancer. In addition to contributing to heart disease and diabetes, obesity is a major unrecognized risk factor for cancer. Obesity is associated with worsened prognosis after cancer diagnosis and also negatively affects the delivery of systemic therapy, contributes to morbidity of cancer treatment, and may raise the risk of second malignancies and comorbidities. The ASCO is committed to reducing the impact of obesity on cancer and has established a multipronged initiative to accomplish this goal. Source: http://jco.ascopubs.org/美国临床肿瘤协会（ASCO）的政策声明中强调了肥胖，这一预计将超过吸烟成为癌症最主要的可预防的病因，所造成的日益严重的癌症威胁。除了促发心脏病和糖尿病，肥胖是癌症一个主要的尚未认识到的危险因素。肥胖与癌症确诊后的预后恶化有关，并且对癌症系统性治疗的实施产生不利影响，增加癌症治疗的发病率，并可能提高第二个恶性肿瘤和并发症的危险。该协会致力于减少肥胖对癌症的影响，并建立了多管齐下的举措来实现这一目标。来源：http://jco.ascopubs.org/
