Objective To analyze the tumor characteristics associated with achieving pathological complete response(pCR) and tumor prognosis in the patients undergoing laparoscopic rectal cancer surgery after neoadjuvant chemoradiotherapy(nCRT). Methods A retrospective review was conducted on clinical and pathological data of locally advanced rectal cancer(LARC) patients who underwent nCRT at Renji Hospital from January 2017 to January 2024. Factors influencing the achievement of pCR were analyzed, and the patients prognosis of pCR group and non-pCR group was compared. Results Univariate analysis, multivariate Logistic regression analysis, and receiver operating characteristic (ROC) curve analysis showed that tumor length less than 5 cm(cutoff value 5.24 cm) and baseline carcinoembryonic antigen(CEA) less than 5 μg/L(cutoff value 5.33 μg/L) were independent predictors of achieving pCR after nCRT in LARC patients. Prognostic survival analysis showed that the 3-year overall survival(OS) rate for pCR group and non-pCR group were 92.86% and 82.46%, respectively (P=0.193), and the 3-year disease-free survival (DFS) rate were 85.71% and 70.18%, respectively (P=0.141), with no statistically significant differences between the two groups. Conclusions Tumor length and baseline CEA level are independent predictors for achieving pCR after nCRT in LARC patients. Additionally, there were no statistically significant differences in 3-year OS and DFS between pCR group and non-pCR group.

Objective:To conduct simulated graduation skill assessment and annual skill assessment by self-designed objective structured clinical examination (OSCE) for standardized training of radiation oncology residents.Methods:The structured examination, standardized questions and standardized tasks of each disease were designed by teaching team of radiation oncology in the University of Hong Kong-Shenzhen Hospital. The implementation effect of the annual assessment and simulated completion assessment of standardized training for residents in radiation oncology from Class 2019 to 2021 was prospectively observed. The difference between scores by two independent examiners was analyzed by the paired t-test. The overall feedback of residents and examiners for the implementation were collected after the completion of OSCE. Results:A total of 18 residents participated in 67 sessions of 3-station skill assessments of different diseases, including 2 make-up tests. There was no difference in the score pairing and grade pairing tests between two examiners at 3 stations ( t=0.85, -0.68, -1.16; P=0.401, 0.499, 0.255). A total of 91.3% of the residents reported that the assessment well reflected their actual clinical competency. Conclusions:The current program of OSCE assessment for radiation oncology meets objectification, standardization and high efficiency, and achieves the goal of making trainers familiar with the graduation skill assessment and assessing comprehensive clinical competence. It is a reproducible and flexible structured assessment model.

Adhesive intestinal obstruction is the most common type of ileus, and conserva-tive treatment serves as its preferred treatment option. In the course of conservative treatment, gastrointestinal decompression will relieve symptoms, prevent ileus progression and promote gas-trointestinal function recovery, which has significant clinical effects. Currently, decompression effects of nasointestinal tubes and nasogastric tubes are controversial. There is a previous Meta-analysis evaluating decompression effects of these two methods, but this analysis includes non-randomized controlled trial and lacks research about Chinese patients. Therefore, the authors con-duct a Meta-analysis to evaluate decompression effects of nasointestinal tubes versus nasogastric tubes for adhesive intestinal obstruction.