Annals of Surgical Treatment and Research最新文献

{"title":"Comparison of da Vinci SP and Xi surgical systems for robotic lateral transperitoneal adrenalectomy: a retrospective single-center observational study.","authors":"Da Young Yu, Young Woo Chang, Dohoe Ku, Seung Yeon Ko, Hye Yoon Lee, Gil Soo Son","doi":"10.4174/astr.2025.108.6.367","DOIUrl":"10.4174/astr.2025.108.6.367","url":null,"abstract":"<p><strong>Purpose: </strong>Robotic adrenalectomy was developed to address the limitations of laparoscopic adrenalectomy and enhance the visualization, dexterity, and control of surgeons performing this beneficial minimally invasive technique. This study compared the clinical and perioperative outcomes of lateral transperitoneal adrenalectomy using da Vinci SP and Xi robotic systems (Intuitive Surgical).</p><p><strong>Methods: </strong>We retrospectively analyzed 84 patients who underwent robotic adrenalectomies at a single institution between January 2019 and July 2024. Sixty-two and 22 patients were treated with da Vinci Xi and SP systems, respectively.</p><p><strong>Results: </strong>No significant differences in patient demographics, tumor size, or postoperative hospital stay between the 2 groups were observed. The SP system demonstrated significantly shorter operative times for right-sided adrenalectomy (81.0 ± 17.1 minutes <i>vs.</i> 113.3 ± 26.2 minutes, P < 0.001), whereas no significant differences were observed in overall operative time (104.9 ± 28.2 minutes for Xi <i>vs.</i> 93.5 ± 23.2 minutes for SP, P = 0.094) or left adrenalectomy (99.9 ± 28.4 minutes for Xi <i>vs.</i> 104.0 ± 23.0 minutes for SP, P = 0.253).</p><p><strong>Conclusion: </strong>The da Vinci Xi and SP systems are both effective for robotic adrenalectomy, with the SP system showing particular advantages in right-sided procedures.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 6","pages":"367-373"},"PeriodicalIF":1.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12149986/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144274053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of outcomes for chemo-port implantation performed in the operating room and interventional radiology suite: a retrospective observational study.","authors":"Yong-Man Park, Donghyoun Lee, Jaemin Jo, Won-Bae Chang","doi":"10.4174/astr.2025.108.6.362","DOIUrl":"10.4174/astr.2025.108.6.362","url":null,"abstract":"<p><strong>Purpose: </strong>Chemo-port insertion is performed by a radiologist or surgeon in an interventional radiology (IR) suite or an operating room (OR). The complication rate is approximately 3%-4%. However, there is still a lack of data for comparison when it is performed in different conditions such as IR suite and OR.</p><p><strong>Methods: </strong>This study is for the safety of adult cancer patients after chemo-port implantation by comparing postoperative complication types and rates in different places. Among 375 patients who underwent chemo-port implantation, 203 patients underwent chemo-port implantation by radiologists in an IR suite, and 172 patients underwent the procedure by general surgeons in an OR. In both groups, early and late mortality were investigated. Early and late complication types and rates were also compared, and our study results were compared to the literature.</p><p><strong>Results: </strong>Patients' characteristics showed no differences. Mortality after the procedure was 39 in OR <i>vs.</i> 72 in IR (P < 0.01). Early mortality at 7 days was 1 in IR, no patient in OR (P = 0.36). Catheter problems did not show a statistical difference in these 2 groups (1.16% <i>vs.</i> 0.49%, P = 0.47). Venous thrombosis happened in 4 and 7 (2.33% <i>vs.</i> 3.45%, P = 0.13), and the central line bloodstream infection was in 5 patients and 6 patients (2.91% <i>vs.</i>. 2.96%, P = 0.98), respectively. Skin problems were 6 and 7 (3.49% <i>vs.</i> 3.45%, P = 0.98). Port site infection happened in 6 patients in each group (3.49% <i>vs.</i> 2.96%, P = 0.77).</p><p><strong>Conclusion: </strong>Chemo-port implantation can be performed in OR or IR without difference in complication rates.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 6","pages":"362-366"},"PeriodicalIF":1.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12149993/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144274054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of preoperative prognostic factors on survival outcomes in intrahepatic cholangiocarcinoma: a retrospective cohort study.","authors":"Hyun Jeong Jeon, So Jeong Yoon, Ho Chang Chae, Hyeong Seok Kim, Sang Hyun Shin, In Woong Han, Jin Seok Heo, Hongbeom Kim","doi":"10.4174/astr.2025.108.6.345","DOIUrl":"10.4174/astr.2025.108.6.345","url":null,"abstract":"<p><strong>Purpose: </strong>This study assesses preoperative prognostic factors in intrahepatic cholangiocarcinoma (ICC) to improve risk assessment and inform clinical decisions, focusing on the role of lymph node dissection (LND).</p><p><strong>Methods: </strong>We conducted a retrospective analysis of 234 patients who underwent surgery for ICC at a single institution between 2010 and 2019. Prognostic factors affecting overall survival (OS) were identified through univariate and multivariable logistic regression analyses. Patients were categorized into high-, intermediate-, and low-risk groups based on the number of adverse prognostic factors. Survival curves were compared between the groups that underwent LND and those that did not within each risk category.</p><p><strong>Results: </strong>Of the 234 patients, 138 (59.0%) underwent LND, and 96 (41.0%) did not (non-LND). Significant prognostic factors included preoperative elevation of CEA (>5 ng/mL), CA 19-9 (>37 U/mL), tumor multiplicity, tumor size >5 cm, and extrahepatic invasion. These factors were associated with adverse OS (hazard ratio ranging from 1.69 to 2.54). High-risk patients had significantly lower median OS compared to intermediate and low-risk groups in both LND and non-LND cohorts, but no significant difference in median OS between LND and non-LND groups within each risk category was observed.</p><p><strong>Conclusion: </strong>Preoperative prognostic factors such as CEA, CA 19-9, tumor size, and multiplicity are vital for assessing patient risk in ICC. These factors guide clinical decision-making and emphasize the need for targeted treatment strategies, including the consideration of LND, particularly in high-risk patients. The study underscores the importance of these prognostic indicators in enhancing treatment outcomes.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 6","pages":"345-351"},"PeriodicalIF":1.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12149987/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144274055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical challenges and outcomes of thoracoscopic <i>versus</i> open repair in esophageal atresia: a single-center retrospective comparative study.","authors":"Dayoung Ko, Ji-Hyun Lee, Joong Kee Youn, Hyun-Young Kim","doi":"10.4174/astr.2025.108.6.390","DOIUrl":"10.4174/astr.2025.108.6.390","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to compare clinical outcomes between thoracoscopic surgery (TR) and open surgery (OR) for esophageal atresia with distal tracheoesophageal fistula (EA with distal TEF) and to evaluate the feasibility of TR.</p><p><strong>Methods: </strong>We retrospectively analyzed the clinical data of 42 patients who underwent primary surgery for EA with distal TEF from January 2012 to December 2020. We compared the OR and TR groups based on patient characteristics, intraoperative outcomes, and early and late postoperative outcomes.</p><p><strong>Results: </strong>The TR group had longer operation times and a higher risk for intraoperative hypoxic events. Anastomosis leakage and stricture tended to occur more frequently in the TR group, although not statistically significant. The TR group required a significantly higher number of esophageal balloon dilatations (P = 0.006).</p><p><strong>Conclusion: </strong>Successful TR for EA with distal TEF requires advanced anesthesia and efforts to overcome the learning curve of surgical skill with limited thoracoscopic instruments for neonates. Despite challenges, TR is considered a feasible method for EA with distal TEF patients when performed by experienced pediatric surgeons with appropriate anesthesia support.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 6","pages":"390-396"},"PeriodicalIF":1.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12149988/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144274052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lateral pelvic lymph node dissection based on nodal response to neoadjuvant chemoradiotherapy in mid/low rectal cancer: a retrospective comparative cohort study.","authors":"Tae-Gyun Lee, Duck-Woo Kim, Hong-Min Ahn, Hye-Rim Shin, Mi Jeong Choi, Min Hyeong Jo, Heung-Kwon Oh, Sung-Bum Kang","doi":"10.4174/astr.2025.108.6.333","DOIUrl":"10.4174/astr.2025.108.6.333","url":null,"abstract":"<p><strong>Purpose: </strong>Total mesorectal excision (TME) without lateral pelvic lymph node (LPN) dissection (LPND) is feasible in patients with mid/low rectal cancer showing a reduction in LPN size to ≤5 mm following neoadjuvant chemoradiotherapy (nCRT). We aimed to evaluate the clinical outcomes of selective LPNDs based on these criteria.</p><p><strong>Methods: </strong>Patients with mid/low rectal cancer and LPNs >5 mm before nCRT were included and classified based on nCRT response (post-nCRT LPN size ≤5 mm [responsive] <i>vs.</i> >5 mm [persistent]) and surgical procedure (TME alone <i>vs.</i> TME + LPND). In the responsive group, LPND was selectively performed only if morphologic predictors of LPN metastasis were present. Clinical outcomes were analyzed across subgroups.</p><p><strong>Results: </strong>Of 122 patients, 82 were in the responsive group. Within this group, 61 underwent TME alone and 21 underwent TME + LPND. No locoregional recurrence was observed in either subgroup of the responsive group, with similar systemic metastasis rates (13.1% <i>vs.</i> 14.3%, P > 0.99). The TME alone subgroup showed significantly smaller post-nCRT LPN sizes (1.7 ± 2.1 mm <i>vs.</i> 3.9 ± 1.8 mm, P < 0.001) and lower ycN positivity rates (31.1% <i>vs.</i> 71.4%, P = 0.001).</p><p><strong>Conclusion: </strong>Selective LPND based on post-nCRT LPN size ≤5 mm and the absence of morphologic predictors of metastasis may serve as a feasible option for managing mid/low rectal cancer with enlarged LPNs, thereby optimizing local control and reducing unnecessary surgeries.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 6","pages":"333-344"},"PeriodicalIF":1.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12149989/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144274056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Outcomes of pancreas transplantation over two decades: a single-center retrospective cohort study.","authors":"Jiyoung Shin, Hye Young Woo, Eun-Ah Jo, Ara Cho, Ahram Han, Sanghyun Ahn, Sangil Min, Jongwon Ha","doi":"10.4174/astr.2025.108.5.271","DOIUrl":"https://doi.org/10.4174/astr.2025.108.5.271","url":null,"abstract":"<p><strong>Purpose: </strong>Pancreas transplantation (PT) is a definitive treatment for diabetes mellitus (DM), restoring endogenous insulin secretion and improving glycemic control. Despite its efficacy, PT is less common in South Korea compared to Western nations. This study aims to report the clinical outcomes of PT over 2 decades at a single center, focusing on surgical techniques, complications, and graft survival.</p><p><strong>Methods: </strong>A retrospective analysis of 69 PT recipients at Seoul National University Hospital between January 2002 and December 2023 was conducted. Data on recipient and donor demographics, surgical details, immunosuppressive regimens, and graft outcomes were collected. Graft survival was evaluated using Kaplan-Meier analysis, with subgroup comparisons using the log-rank test. Graft failure was defined as graft removal, PT re-registration, insulin dependence exceeding 0.5 units/kg/day for more than 90 days, or patient death.</p><p><strong>Results: </strong>Among the 69 recipients, 50 (72.5%) had type 1 DM, and 18 (26.1%) had type 2 DM. Simultaneous pancreas-kidney (SPK) transplantations comprised 84.1% (n = 58), and pancreas-after-kidney (PAK) transplantations accounted for 10.1%. The 1-year and 5-year death-censored pancreas graft survival rates were 92.7% and 89.6%, respectively, with no significant difference between SPK and PAK (P = 0.330). Graft failure occurred in 10 patients, primarily due to pancreatitis and rejection. Donor-related factors, particularly anoxic brain injury, were significantly associated with lower graft survival (P = 0.045).</p><p><strong>Conclusion: </strong>PT outcomes in this cohort align with international standards, emphasizing the importance of donor selection and tailored immunosuppression. Expanding PT indications to include selective type 2 DM patients could benefit South Korea's PT programs with adequate resource allocation.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 5","pages":"271-278"},"PeriodicalIF":1.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12059245/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144061958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Re-do laparoscopic common bile duct exploration for recurrent common bile duct stones: a single-center retrospective cohort study.","authors":"In Ho Lee, Seung Jae Lee, Ju Ik Moon, Sang Eok Lee, Nak Song Sung, Seong Uk Kwon, In Eui Bae, Seung Jae Rho, Sung Gon Kim, Min Kyu Kim, Dae Sung Yoon, Won Jun Choi, In Seok Choi","doi":"10.4174/astr.2025.108.5.310","DOIUrl":"https://doi.org/10.4174/astr.2025.108.5.310","url":null,"abstract":"<p><strong>Purpose: </strong>Common bile duct (CBD) stone recurrence after laparoscopic CBD exploration (LCBDE) is relatively common. No studies have been conducted evaluating the safety and feasibility of re-do LCBDE in the treatment of recurrent CBD stones.</p><p><strong>Methods: </strong>This single-center retrospective study reviewed 340 consecutive patients who underwent LCBDE for CBD stones between January 2004 and December 2020. Patients with pancreatobiliary malignancies and those who underwent other surgical procedures were excluded.</p><p><strong>Results: </strong>Of the 340 included patients, 45 experienced a recurrence after a mean follow-up period of 24.2 months. Of them, 18 underwent re-do LCBDE, 20 underwent endoscopic intervention, 2 underwent radiologic intervention, and 5 underwent observation. Re-do LCBDE and initial LCBDE showed similar surgical outcomes in terms of operative time (113.1 minutes <i>vs.</i> 107.5 minutes, P = 0.515), estimated blood loss (42.5 mL <i>vs.</i> 49.1 mL, P = 0.661), open conversion rate (2.9% <i>vs.</i> 0%, P = 0.461), postoperative complication (15.3% <i>vs.</i> 22.2%, P = 0.430), and postoperative hospital stay (6.5 days <i>vs.</i> 6.4 days, P = 0.921). Comparing re-do LCBDE and nonsurgical treatment (endoscopic or radiologic), no statistically significant differences were noted in posttreatment complication (22.2% <i>vs.</i> 13.6%, P = 0.477), hospital stay (6.4 days <i>vs.</i>7.3 days, P = 0.607), and recurrence (50.0% <i>vs.</i> 36.4%, P = 0.385). The clearance rate was higher in the re-do LCBDE group than in the nonsurgical group (100% <i>vs.</i> 81.8%, P = 0.057).</p><p><strong>Conclusion: </strong>Compared to initial LCBDE and endoscopic or radiological treatments, re-do LCBDE for recurrent CBD stones is a treatment option worth considering in selected patients.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 5","pages":"310-316"},"PeriodicalIF":1.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12059247/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tumors arising from an axillary accessory breast: a 10-year retrospective cohort study at a single center.","authors":"Sung Ryul Lee, Ji Hyun Lee, Hyok Jo Kang","doi":"10.4174/astr.2025.108.5.302","DOIUrl":"https://doi.org/10.4174/astr.2025.108.5.302","url":null,"abstract":"<p><strong>Purpose: </strong>Pathologic lesions may occur in an axillary accessory breast (AAB). This study aimed to evaluate the characteristics of tumors arising from AABs and to recommend appropriate treatment.</p><p><strong>Methods: </strong>This retrospective study involved 3,544 women (18-65 years old) with AAB at Damsoyu Hospital in Korea from 2014 to 2023. The patients were divided into an AAB with benign tumors (TAAB) group and an AAB without tumors (AAB) group, and the tumors' pathologies were reviewed. A core biopsy was performed on tumors with possible malignancy identified by preoperative ultrasonography. All patients underwent complete excision of accessory mammary gland (AMG) tissue, including tumors. The postoperative results were checked 6 months after surgery.</p><p><strong>Results: </strong>Fifty-two out of 3,554 patients had tumors confirmed by preoperative ultrasonography. Preoperative core biopsies were performed on 11 patients. Two patients had malignant tumors (invasive ductal carcinoma) identified by core biopsy. Fifty patients had benign tumors identified by postoperative pathological analysis (46 fibroadenomas, 2 fibrocystic changes, and 2 sclerosing adenoses). Carcinoma <i>in situ</i> was confirmed in 2 patients using postoperative pathological analysis. No patients in either group developed tumors in the axilla during the follow-up period. All patients were satisfied with the axillary pain relief and the disappearance of bulging lesions.</p><p><strong>Conclusion: </strong>We recommend a core biopsy if preoperative ultrasonography indicates a possibly malignant tumor. AAB patients may experience tumors, pain, and bulging appearance of an AMG; thus, complete AMG excision is necessary.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 5","pages":"302-309"},"PeriodicalIF":1.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12059243/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143974783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Breast cancer implant reconstructive surgery and radiotherapy: a retrospective analysis of medical records.","authors":"Ji Young Yun, Ki Jung Ahn, Hyunjung Kim, Hee Yeon Kim, Tae Hyun Kim, Kyung Do Byun, Ji Sun Park, Yunseon Choi","doi":"10.4174/astr.2025.108.5.295","DOIUrl":"https://doi.org/10.4174/astr.2025.108.5.295","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to analyze whether the occurrence of complications increases if radiotherapy (RT) is administered after breast reconstructive surgery using implants.</p><p><strong>Methods: </strong>This retrospective study included 80 patients who underwent breast reconstruction using implants, of which 16 (20.0%) underwent RT. Most patients underwent conventional fractionated RT (n = 13), and hypofractionated RT was performed in 3 patients. Most patients (n = 51, 63.8%) underwent delayed reconstruction, which involved implant replacement after tissue expander insertion. Only 29 patients (36.3%) underwent immediate reconstruction simultaneously with breast cancer surgery.</p><p><strong>Results: </strong>The median postoperative follow-up was 39.9 months (range, 8.7-120.3 months). Complications occurred in 18 (22.5%); infection/necrosis (n = 8), leakage/rupture (n = 8), and capsular contracture (n = 2). Infection/necrosis is common in patients undergoing RT. Complications occurred in 4 patients (25.0%) who received RT and 14 (21.9%) who did not receive RT, and complications did not significantly increase with RT (P = 0.511). There was no overall difference in complications between the immediate (4 of 29) and delayed (14 of 51) reconstruction groups (P = 0.129). Nine patients underwent reoperation because of complications; 3 (18.8%) received RT and 6 (9.4%) did not receive RT. The reoperation rate did not increase significantly with RT (P = 0.254). There were 3 cases of recurrence, and patients who received RT had no recurrence.</p><p><strong>Conclusion: </strong>RT did not significantly increase the complication or reoperation rates if reconstructive surgery was performed using implants. Therefore, RT should be performed in patients at a high risk of recurrence.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 5","pages":"295-301"},"PeriodicalIF":1.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12059242/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Establishment of an orthotopic nude mouse model for recurrent pancreatic cancer after complete resection: an experimental animal study.","authors":"Sung Eun Park, Tae Ho Hong","doi":"10.4174/astr.2025.108.5.317","DOIUrl":"https://doi.org/10.4174/astr.2025.108.5.317","url":null,"abstract":"<p><strong>Purpose: </strong>This study created a nude mouse model to study pancreatic cancer recurrence. Circumstances leading to the highest recurrence rates after curative surgery were also analyzed.</p><p><strong>Methods: </strong>A total of 135 nude mice were divided into 3 groups: sham, metastasis, and resection (45 mice in each group). In sham and resection groups, AsPc-1 cells suspended in a synthetic extracellular matrix were injected into the tail of the pancreas of each mouse. In the metastasis group, cells were injected into the spleen. After 3 weeks, the resection group underwent distal pancreatectomy and the metastasis group underwent diagnostic laparotomy to confirm metastasis. To assess disease recurrence, the resection group was monitored weekly using luminescence imaging. Diagnostic exploration was conducted 3 weeks after surgery. Recurrence rate was evaluated and histological examination was performed for the resection group.</p><p><strong>Results: </strong>Among 45 mice, 43 developed cancerous masses in the tail of the pancreas without invading adjacent organs 3 weeks after the initial orthotopic injection. Of those 43 mice, one died due to intraoperative bleeding during complete surgical resection. Pancreatic cancer recurrence was observed in 37 of 42 mice (88.1%) at an average of 21.8 ± 2.2 days. Histological examination showed high nuclear pleomorphism and neoangiogenesis.</p><p><strong>Conclusion: </strong>We developed an efficient model that could demonstrate recurrence after complete resection of pancreatic cancer. By confirming that recurrence occurs after surgery using this protocol, our model is expected to contribute to the development of various treatment strategies.</p>","PeriodicalId":8071,"journal":{"name":"Annals of Surgical Treatment and Research","volume":"108 5","pages":"317-324"},"PeriodicalIF":1.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12059248/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}