Background/Aims: Hybrid endoscopic submucosal dissection (ESD), in which an incision is made around a lesion and snaring is performed after submucosal dissection, has some advantages in colorectal surgery, including shorter procedure time and preventing perforation. However, its value for rescue resection in difficult colorectal ESD cases remains unclear. This study evaluated the utility of rescue hybrid ESD (RH-ESD). Methods: We divided 364 colorectal ESD procedures into the conventional ESD group (C-ESD, n=260), scheduled hybrid ESD group (SH-ESD, n=69), and RH-ESD group (n=35) and compared their clinical outcomes. Results: Resection time was significantly shorter in the following order: RH-ESD (149 [90–197] minutes) >C-ESD (90 [60–140] minutes) >SH-ESD (52 [29–80] minutes). The en bloc resection rate increased significantly in the following order: RH-ESD (48.6%), SH-ESD (78.3%), and C-ESD (97.7%). An analysis of factors related to piecemeal resection of RH-ESD revealed that the submucosal dissection rate was significantly lower in the piecemeal resection group (25% [20%–30%]) than in the en bloc resection group (40% [20%–60%]). Conclusions RH-ESD was ineffective in terms of curative resection because of the low en bloc resection rate, but was useful for avoiding surgery.

Introduction: During their clinical clerkship (CC), Japanese medical students’ literature searching skills were ambiguous. We conducted a questionnaire survey on students’ search processes to determine whether this skill improved after a lecture on conducting searches.　Method: This study was conducted from May to December 2019. The questionnaire survey was followed by a 90-minute lecture combining information and relevant activities. The questionnaire included students’ self-evaluation of their literature searching abilities, and references from their medical summaries and reports were compared to those of students from a 2018 group who did not attend the lecture.　Results: Sixty-seven students participated in the questionnaire survey and lecture. Questionnaire results demonstrated that the most frequently used search tool was PubMed. Regularly used types of literature were Japanese textbooks medical guidelines issued by the Japanese Medical Society, and English-language medical journal articles. The two major difficulties in conducting searches were the inability to critically appraise the literature and inadequate English reading skills.　The students’ satisfaction level regarding the lecture was found to be acceptable. After attending the lecture, students’ self-evaluation of their literature searching abilities improved significantly. Furthermore, compared to the 2018 group, references in students’ summaries and reports increased. Additionally, the number of English-language medical journal articles cited in reports was higher among students in the 2019 group than the 2018 group.　Conclusions: Although CC students can conduct literature searches, they struggle with critical appraisal and English-language comprehension. Interventions such as lectures may effectively improve their searching skills during CC.