Analysis on the Characteristics of Malignant Tumors treatment in Chongqing (Main Urban Area) from 2020-2021

1. Abstract
1.1. Objective: To analyze the characteristics of malignant tumors treatment in Chongqing (main urban area, including 10 million people) from 2020-2021.
1.2. Methods: We collected and analyzed the data of special medical insurance for malignant tumors treatment (reflect malignant tumors treatment directly) in Chongqing (main urban area) managed by the Chongqing University Cancer Hospital from 2020 to 2021.
1.3. Results: From 2020-2021, there were 26003 and 30902 cases of malignant tumor treatment registered in ChongQing (main urban area), respectively, including 13714 and 15613 male cases; 12289 and 15289 female cases. The malignant tumors treatment peaked in male at the age of 60 to 70 years old but peaked in women from the age of 50 years old. The top 5 malignant tumors in males were lung cancer, colorectal cancer, liver cancer, prostate cancer and esophageal cancer; the top 5 in females were lung cancer, breast cancer, thyroid cancer, colorectal cancer and cervical cancer. Among the common malignant tumors, thyroid cancer showed the youngest median age of treatment (42-43 years old); prostate cancer showed the est median age of treatment (73-75 years old). Thyroid cancer was the only common malignant tumor that attacked women more than men besides breast cancer, cervical cancer and ovarian cancer. All other common malignant tumors attacked men more than women. The highest invasion and metastasis rates were showed in ovarian cancer, pancreatic cancer, prostate cancer and lung cancer, and the lowest rates were in thyroid cancer and bladder cancer. Compared with the national data of malignant tumors in 2016, the composition ratio of malignant tumors in Chongqing (main urban area) was significantly different with unique characteristics.
1.4. Conclusion: The spectrum of malignant tumors in Chongqing (main urban area) has its own characteristics. The tumor screening in Chongqing should consider the differences in gender, age and composition of common malignant tumors.
2. Introduction
Malignant tumors are serious threats to human health. Each year, malignant tumors attack about 19 million people and cause about 10 million deaths globally; 57% of new cases and 65% of deaths occur in developing countries [1, 2]. Studies have shown that the incidence of malignant tumors is increasing significantly in China [3, 4]. Malignant tumors have become the leading cause of death among Chinese [5].
The onset of malignant tumors may be associated with factors such as genetic mutation, smoking, chronic infections (e.g., helicobacter pylori, hepatitis B virus and human papillomavirus), obesity, unhealthy lifestyle, environmental pollution and occupational exposure[6-9]. Chinese government attaches great importance to tumor prevention and treatment.