[Diagnosis and treatment of adult tumor patients with COVID-19].

After the first outbreak of corona virus disease 2019 (COVID-19) at the end of 2019, it has caused multiple rounds of transmission in many countries around the world. Cancer patients are mainly elderly people, and the immunosuppression state caused by the tumor itself and anti-tumor treatment, more accompanying underlying diseases, and more hospital environmental exposure leading to a higher incidence of COVID-19 infection. The proportion of severe cases after infection is high, and the mortality is high. Therefore, based on the domestic and foreign research and clinical practice, the Expert Committee of Geriatric Cancer Prevention and Treatment of Chinese Society of Clinical Oncology launched a discussion based on the characteristics of cancer patients, including the epidemiology, clinical manifestations, differential diagnosis, definition and risk factors of severe cases, diagnosis and treatment recommendations, recovery of anti-tumor treatment and vaccination recommendations. To provide the corresponding suggestions for the clinical diagnosis and treatment of such patients.自2019年底新型冠状病毒感染(COVID-19)疫情已在全球多个国家引起多轮传播。肿瘤患者多以老年人群为主，伴随基础疾病多、肿瘤本身以及抗肿瘤治疗导致的免疫抑制状态、更多的医院环境暴露等原因导致肿瘤患者感染新型冠状病毒的概率更高，肿瘤患者感染后重症比例较高，死亡率高，目前相关的诊疗指南难以覆盖肿瘤人群面临的诸多临床问题。因此，在国内外研究及临床实践的基础上，中国临床肿瘤学会老年肿瘤防治专家委员会结合肿瘤患者的特点展开讨论，内容包括肿瘤合并COVID-19的流行病学、临床表现、鉴别诊断、重症患者的定义和风险因素、诊疗建议、抗肿瘤治疗的恢复及疫苗接种建议，以期为肿瘤患者感染新型冠状病毒诊治提供参考。.