Thymic epithelial tumors are the most common tumors in anterior mediastinum. They are used to be considered rare in incidence, with an indolent nature of biological behaviors, which led to the lack of high level evidence obtained from prospective randomized controlled trials to guide the clinical treatment. At present, the experience of diagnosis and treatment of thymic tumors varies greatly in different regions. And there are still many problems remain to be solved. This paper aims to establish a standardized surgical treatment based on the latest researches in surgical indications, resection extent, surgical approach, lymph node dissection and postoperative management of thymic tumors.

Objective: To describe the mortality trend of major malignant tumors in Shandong province, from 1970 to 2013. Methods: Data related to cancer mortality were obtained from the Shandong Death Registration System and three nationwide retrospective cause-of-death surveys. Trends of overall mortality and major causes of death were described using the indicators as: mortality rates and age-standardized mortality rates, through comparing the three large-scale mortality surveys in Shandong province. Difference decomposing method was applied to estimate the contribution of demographic and non-demographic factors for the change of mortality. Results: From 1970 to 2013, the crude mortality rate of malignant tumors in Shandong was increasing. The age standard mortality rate was increasing and then decreasing. The composition of cancer deaths in the all-cause-deaths was seen increasing and then decreasing as well. Both demographic and non-demographic factors contributed to the increase of crude cancer mortality rate. With the gradual increase of the proportion of population, its role exceeded the non-demographic factors. The age-standardized mortality rate of malignant tumors in 2011-2013 was lower than that in 2004-2005. Lung cancer mortality rose from the fifth to the first place, with an increase of 6.81 times from 1970-1974 to 2011-2013. Ranking of gastric cancer mortality dropped from first to the third place, with esophageal cancer dropped from second to the fourth. After adjusted by China’s standard population in 1964, the mortality rate of lung cancer was still rapidly increasing, but the age-standardized mortality rates of esophageal cancer was gradually decreasing. The crude and age-standardized mortality rates of cervical cancer showed a rapid downward trend, reduced 87.00% and 93.00% respectively from 1970-1974 to 2011-2013. Conclusions Malignant tumors were still major threats to the residents of Shandong province. The changing trend of different malignant tumors presented an inconsistent nature which called for different intervention strategies be carried out, accordingly.

Objective: To estimate the incidence and mortality of nasopharyngeal carcinoma in China based on cancer registration data in 2014, collected by the National Central Cancer Registry (NCCR). Methods: 449 cancer registries submitted nasopharyngeal carcinoma incidence and deaths occurred in 2014 to NCCR. After evaluating the data quality, 339 registries′ data were accepted for analysis and stratified by area (urban/rural) and age group. Combined with data on national population in 2014, the nationwide incidence and mortality of nasopharyngeal carcinoma were estimated. Chinese population census in 2000 and Segi′s population were used for age-standardized incidence and mortality rates. Results: The estimates of new nasopharyngeal carcinoma incident cases and deaths were 44.6 thousands and 24.2 thousands, respectively. The crude incidence rate was 3.26/100 000 (Male 4.51/100 000, Female 1.94/100 000). Age-standardized incidence rates by Chinese standard population (ASIRC, 2000) and by world standard population (ASIRW) were 2.48/100 000 and 2.33/100 000, respectively. Male to female ratio was 2.32∶1. The ASIRC in urban and rural areas were all 2.48/100 000. The crude mortality rate of nasopharyngeal carcinoma was 1.77/100 000 (Male 2.55/100 000, Female 0.95/100 000). Age-standardized mortality rates by Chinese standard population (ASMRC, 2000) and by world standard population(ASMRW) were 1.23/100 000 and 1.20/100 000, respectively. The ASMRC in urban and rural areas were all 1.23/100 000. The cumulative incidence and mortality rates(0-74 years old)were 0.25% and 0.14%, respectively. Conclusions Incidence and mortality of nasopharyngeal carcinoma in China in 2014 were at high levels in the world. Corresponding prevention and control measures should be established according to the epidemic characteristics and risk factors of nasopharyngeal carcinoma.

Resection is one of the most important treatments for esophageal squamous cell carcinoma, and routine postoperative follow-up is an effective method for early detection and treatment of recurrent metastases, which can improve patients' quality of life and prognosis. This consensus aims to provide a reference for colleagues responsible for postoperative follow-up of esophageal squamous cell carcinoma patients in China, and further improve the standardization of the diagnosis and treatment of esophageal squamous cell carcinoma.