Annals of Surgical Oncology最新文献

Background: Pancreatic acinar cell carcinoma (pACC) is a rare neoplasm of the exocrine pancreas. There is a dearth of information about tumor characteristics and patient outcomes. This study describes the clinical characteristics, genetic alterations, and survival outcomes of resected pACC.

Patients and methods: Consecutive patients undergoing pancreatectomy for pathologically confirmed pACC from 1999 to 2022 across three high-volume pancreas surgery centers were analyzed. Patient demographics, tumor characteristics, treatment data, and genetic sequencing were obtained through retrospective abstraction.

Results: A total of 61 patients with resected pACC were identified. Median overall survival (OS) was 73 months and median recurrence free survival was 22 months. Nine patients underwent resection for oligometastatic disease; median OS was not reached after a median follow-up of 31 months from date of metastasectomy. Adjuvant chemotherapy was administered in 67% of patients with FOLFOX/FOLFIRINOX (5-fluorouracil, leucovorin, oxaliplatin, ± irinotecan) the most common regimen (58%). Sequencing data were obtained in 47 (77%) patients. A mutation in at least one of three core genes associated with the homologous recombination repair (HRR) pathway (BRCA1, BRCA2, or PALB2) occurred in 26% (n = 12) with BRCA2 the most frequently identified. A mutation in any other "non-core" gene associated with DNA damage repair or the HRR pathway was identified in 45% (n = 21) with a high tumor mutational burden of > 10 mutations per megabase in 13%.

Conclusions: Resection of pACC is associated with favorable survival outcomes, even in the setting of oligometastatic disease. Mutations in the HRR pathway are common, providing opportunities for potential targeted therapeutic options.

Background: Consensus regarding the hyperthermic intraperitoneal chemotherapy (HIPEC) for colorectal cancer (CRC) regimen remains elusive. In this study, patient-derived tumor organoids from CRC were utilized as a preclinical model for in vitro drug testing of HIPEC regimens commonly used in clinical practice. This approach was used to facilitate the clinical formulation of HIPEC.

Method: Tumor tissues and corresponding clinical data were obtained from patients diagnosed with CRC at the Sixth Affiliated Hospital of Sun Yat-Sen University. Qualified samples were cultured and passaged. We aimed to assess the sensitivity of in vitro hyperthermic perfusion using five different regimens, i.e. mitomycin C, mitomycin C combined with cisplatin, mitomycin C combined with 5-fluorouracil, oxaliplatin, and oxaliplatin combined with 5-fluorouracil.

Results: Tumor organoids obtained from 46 patients with CRC were cultured, and in vitro hyperthermic perfusion experiments were conducted on 42 organoids using five different regimens. The average inhibition rate of mitomycin C was 85.2% (95% confidence interval [CI] 80.4-89.9%), mitomycin C combined with cisplatin was 85.5% (95% CI 80.2-90.7%), mitomycin C combined with 5-fluorouracil was 65.6% (95% CI 59.6-71.6%), oxaliplatin was 37.9% (95% CI 31.5-44.3%), and oxaliplatin combined with 5-fluorouracil was 40.7% (95% CI 33.9-47.5%).

Conclusion: In vitro hyperthermic perfusion demonstrates that the inhibition rate of mitomycin C, both alone and in combination with cisplatin, surpasses that of the combination of mitomycin C with 5-fluorouracil and oxaliplatin. In clinical practice, the combination of mitomycin C and cisplatin can be regarded as the optimal choice for HIPEC in CRC.

Background: Pancreatic enucleation is a reliable surgical method for treating benign and borderline pancreatic tumors; however, the incidence of postoperative pancreatic fistula (POPF) is high, especially when the tumor is close to the main pancreatic duct. This study aimed to reduce the incidence of pancreatic fistula by preoperative placement of pancreatic stents and to summarize our center's experience with this procedure.

Methods: From June 2020 to July 2023, patients diagnosed with benign or borderline pancreatic tumors at Renji Hospital were included. The pancreatic duct stent is placed through endoscopic retrograde cholangiopancreatography on the day of surgery or 1 day before surgery. The effectiveness of preoperative pancreatic stent placement in reducing pancreatic fistula was investigated by comparing the incidence of perioperative and postoperative complications.

Results: Overall, 63 patients were included in the study, 41 of whom had preoperative pancreatic stents. Multivariate logistic regression showed that tumors located in proximity to the main pancreatic duct (≤ 2 mm) (odds ratio [OR] 5.58, p = 0.020) is an independent risk factor for pancreatic fistula, while preoperative stent placement (OR 0.23, p = 0.021) significantly reduces the occurrence of pancreatic fistula. There was no difference in the incidence of grade Ш-IV complications (p = 0.33) and postoperative pancreatitis (p > 0.99) between groups with or without pancreatic stent.

Conclusion: Preoperative placement of pancreatic stents is associated with a lower incidence of pancreatic fistula, especially in patients with tumors adjacent to the main pancreatic duct. Moreover, preoperative pancreatic stents do not increase the incidence of postoperative pancreatitis or grade Ш-IV complications.

Background: Superparamagnetic iron oxide nanoparticles (SPIO) are emerging as a viable alternative to technetium and blue dye. Our study was designed to evaluate the correlation between SPIO dose, injection site, and timing with sentinel lymph node (SLN) detection and iron content in retrieved SLNs.

Methods: This study combined individual patient data from three Dutch and five Swedish studies. Associations between SLN detection and dose, site, and timeframe of SPIO injection were examined. The iron content for each retrieved SLNs with or without metastases were calculated according to a predefined look up table based on probe counts and sensitivity setting. Analyses were conducted by using multivariable logistic and linear regression models using generalized estimating equation.

Results: A total of 908 patients were included. The detection between the magnetic technique (96.6%) and the radioactive technique was comparable (96.6% vs. 96.8%, p = 0.75). The 1.0-mL SPIO dose was associated with the highest, and <0.5 mL of SPIO was associated with the lowest patient-based detection (100.0 and 96.6% respectively). An intratumoural injection was found to be less favourable compared with peritumoural and subareolar, whereas injection >168 hours before surgery demonstrated the highest patient-based detection.

Conclusions: The noninferiority of SPIO compared with technetium99m ± BD has been proven by several studies. A dose of 1 mL, around the areola, with a longer exposure time, appears to increase the SPIO uptake in the nodes and SLN detection. Metastatic burden in SLNs did not significantly impact the uptake of SPIO.

Objective: The impact of obesity on outcomes after adrenalectomy for pheochromocytoma is unclear. This study aims to evaluate outcomes after minimally invasive and open adrenalectomy for pheochromocytoma in patients with obesity and to determine factors that may affect outcomes. Patients undergoing adrenalectomy for pheochromocytoma in 46 international centers between 2012 and 2022 were reviewed, analyzing baseline information, length of hospital stay (LOS), and postoperative complications.

Patients and methods: Obese (body mass index (BMI) ≥ 30 kg/m²) and nonobese patients were compared. Multivariable analysis was utilized to evaluate outcomes and risk factors for complications, LOS, and increased comprehensive complication index (CCI).

Results: Of the 2016 patients, 639 (31.7%) had obesity. Operative time (110.0 versus 105.0 min; p = 0.467), conversion to open rate (3.1% versus 4.7%; p = 0.079), estimated blood loss (20.0 versus 20.0 ml, p = 0.088), rate of complications (19.3% versus 20.8%; p = 0.425), and CCI were similar. However, patients with obesity required a median of 1 day longer LOS (4.0 days versus 5.0 days; p < 0.001). On multivariable analysis, obesity was not significantly associated with complications or higher CCI. Analyzing solely obese patients, laparoscopic (OR 0.24; p < 0.001) and robotic (OR 0.22; p = 0.011) approaches were independently associated with less morbidity. Additionally, multivariable modeling demonstrated that a retroperitoneal approach in patients with BMI ≥ 30 kg/m² was independently associated with reduced CCI (- 3.74; p = 0.017). Similar results were demonstrated when analyzing severe obesity (BMI ≥ 35).

Conclusions: Obesity does not increase complications or CCI following pheochromocytoma resection, but it does increase LOS. A retroperitoneal approach may uniquely benefit patients with obesity. In view of rising obesity rates, these results warrant further research to validate findings.

Background: Failure to rescue (FTR) is defined as the inability to prevent death after the development of a complication. FTR is a parameter in evaluating multidisciplinary postoperative complication management. The aim of this study was to evaluate FTR rates after major liver resection for perihilar cholangiocarcinoma (pCCA) and analyze factors associated with FTR.

Patients and method: Patients who underwent major liver resection for pCCA at 27 centers were included. FTR was defined as the presence of a Dindo grade III or higher complication followed by death within 90 days after surgery. Liver failure ISGLS grade B/C were scored. Multivariable logistic analysis was performed to identify predictors of FTR and reported using odds ratio and 95% confidence intervals.

Results: In the 2186 included patients, major morbidity rate was 49%, 90-day mortality rate 13%, and FTR occurred in 24% of patients with a grade III or higher complication. Across centers, major complication rate varied from 19 to 87%, 90-day mortality rate from 5 to 33%, and FTR ranged from 11 to 50% across hospitals. Age [1.04 (1.02-1.05) years], ASA 3 or 4 [1.40 (1.01-1.95)], jaundice at presentation [1.79 (1.16-2.76)], right-sided resection [1.45 (1.06-1.98)], and annual hospital volume < 6 [1.44 (1.07-1.94)] were positively associated with FTR. When liver failure is included, the odds ratio for FTR is 9.58 (6.76-13.68).

Conclusion: FTR occurred in 24% of patients after resection for pCCA. Liver failure was associated with a nine-fold increase of FTR and hospital volume below six was also associated with an increased risk of FTR.

Introduction: Therapeutic clinical trials frequently lack diverse representation, hindering generalizability and exacerbating preexisting disparities in clinical outcomes. This study explored associations between breast cancer patient demographics, clinical trial eligibility, and enrollment in a National Cancer Institute (NCI)-designated cancer center.

Patients and methods: This prospective cohort study included patients with breast cancer screened for therapeutic clinical trials from July 2020 to January 2024. Eligibility was determined by the provider and study coordinator. Patient characteristics were abstracted from the electronic medical record. Rurality and neighborhood disadvantage were mapped by address using rural-urban commuting area codes and area deprivation index (ADI), respectively. Likelihood of eligibility and enrollment by race, rurality, and neighborhood disadvantage were evaluated using risk ratios (RR) and 95% confidence intervals (CIs) from modified Poisson regression models.

Results: Of 343 patients screened for therapeutic trials, the mean age was 56 years (SD 13), 33% were Black/other race, 22% lived in highly disadvantaged areas, and 16% in rural areas. Most patients were screened for one trial (87%). Overall, 54% of patients were eligible for trials, and of those, 58% enrolled. Similar likelihoods of eligibility and enrollment were seen by race and rurality. Though not significant, patients living in highly disadvantaged areas trended toward higher likelihood of enrollment (RR 1.24, 95% CI 0.99-1.55).

Conclusions: Over half of trial-eligible patients, even across race, rurality, or neighborhood disadvantage, enrolled, surpassing the national average. In contrast to national trends, there was higher enrollment among patients of higher ADI.