Ambipolar to Unipolar Conversion in C70/Ferrocene Nanosheet Field-Effect Transistors.

Organic cocrystals, which are assembled by noncovalent intermolecular interactions, have garnered intense interest due to their remarkable chemicophysical properties and practical applications. One notable feature, namely, the charge transfer (CT) interactions within the cocrystals, not only facilitates the formation of an ordered supramolecular network but also endows them with desirable semiconductor characteristics. Here, we present the intriguing ambipolar CT properties exhibited by nanosheets composed of single cocrystals of C70/ferrocene (C70/Fc). When heated to 150 °C, the initially ambipolar monoclinic C70/Fc nanosheet-based field-effect transistors (FETs) were transformed into n-type face-centered cubic (fcc) C70 nanosheet-based FETs owing to the elimination of Fc. This thermally induced alteration in the crystal structure was accompanied by an irreversible switching of the semiconducting behavior of the device; thus, the device transitions from ambipolar to unipolar. Importantly, the C70/Fc nanosheet-based FETs were also found to be much more thermally stable than the previously reported C60/Fc nanosheet-based FETs. Furthermore, we conducted visible/near-infrared diffuse reflectance and photoemission yield spectroscopies to investigate the crucial role played by Fc in modulating the CT characteristics. This study provides valuable insights into the overall functionality of these nanosheet structures.

Fullerene C70/porphyrin hybrid nanoarchitectures: single-cocrystal nanoribbons with ambipolar charge transport properties.

In recent years, supramolecular cocrystals containing organic donors and acceptors have been explored as active components in organic field-effect transistors (FETs). Herein, we report the synthesis of novel single-cocrystal nanoribbons with ambipolar charge transport characteristics from C70 and 5,10,15,20-tetrakis(3,5-dimethoxyphenyl)porphyrin (3,5-TPP) in a 3 : 2 ratio. The C70/3,5-TPP nanoribbons exhibited a new strong absorption band in the near-infrared region, indicating the presence of charge-transfer interactions between C70 and 3,5-TPP in the cocrystals. We elucidated the mechanism of the charge-transport properties of the nanoribbons using photoemission yield spectroscopy in air and theoretical calculations. A strong interaction between porphyrins in the one-dimensional porphyrin chains formed in C70/3,5-TPP nanoribbons, which was confirmed by single-crystal X-ray diffraction, plays a crucial role in their hole transport properties.

Adult hepatocytes direct liver organogenesis through non-parenchymal cell recruitment in the kidney.

BACKGROUND & AIMS: Since the first account of the myth of Prometheus, the amazing regenerative capacity of the liver has fascinated researchers because of its enormous medical potential. Liver regeneration is promoted by multiple types of liver cells, including hepatocytes and liver non-parenchymal cells (NPCs), through complex intercellular signaling. However, the mechanism of liver organogenesis, especially the role of adult hepatocytes at ectopic sites, remains unknown. In this study, we demonstrate that hepatocytes alone spurred liver organogenesis to form an organ-sized complex 3D liver that exhibited native liver architecture and functions in the kidneys of mice. METHODS: Isolated hepatocytes were transplanted under the kidney capsule of monocrotaline (MCT) and partial hepatectomy (PHx)-treated mice. To determine the origin of NPCs in neo-livers, hepatocytes were transplanted into MCT/PHx-treated green fluorescent protein transgenic mice or wild-type mice transplanted with bone marrow cells isolated from green fluorescent protein-mice. RESULTS: Hepatocytes engrafted at the subrenal space of mice underwent continuous growth in response to a chronic hepatic injury in the native liver. More than 1.5 years later, whole organ-sized liver tissues with greater mass than those of the injured native liver had formed. Most remarkably, we revealed that at least three types of NPCs with similar phenotypic features to the liver NPCs were recruited from the host tissues including bone marrow. The neo-livers in the kidney exhibited liver-specific functions and architectures, including sinusoidal vascular systems, zonal heterogeneity, and emergence of bile duct cells. Furthermore, the neo-livers successfully rescued the mice with lethal liver injury. CONCLUSION: Our data clearly show that adult hepatocytes play a leading role as organizer cells in liver organogenesis at ectopic sites via NPC recruitment. LAY SUMMARY: The role of adult hepatocytes at ectopic locations has not been clarified. In this study, we demonstrated that engrafted hepatocytes in the kidney proliferated, recruited non-parenchymal cells from host tissues including bone marrow, and finally created an organ-sized, complex liver system that exhibited liver-specific architectures and functions. Our results revealed previously undescribed functions of hepatocytes to direct liver organogenesis through non-parenchymal cell recruitment and organize multiple cell types into a complex 3D liver at ectopic sites. Transcript profiling: Microarray data are deposited in GEO (GEO accession: GSE99141).

Overexpression of E3 ubiquitin ligase tripartite motif 32 correlates with a poor prognosis in patients with gastric cancer.

Tripartite motif protein (TRIM) 32 belongs to the TRIM family, which is composed of RING finger, B-box and coiled-coil domains. TRIM32 has been reported to function as an enzyme 3 ubiquitin ligase and is overexpressed in numerous types of cancer. The present study evaluated the clinical significance of TRIM32 expression levels in gastric cancer. The current study also investigated the TRIM32 expression levels in 142 patients with gastric cancer using immunohistochemistry and examined its clinical importance and potential as a prognostic marker. Furthermore, the function of TRIM32 was examined in vitro. High TRIM32 expression levels were detected in gastric cancer tissues. The postoperative overall and relapse-free survival rates were significantly reduced in patients with tumors with high levels of TRIM32 expression compared with those with tumors expressing low levels of TRIM32. Tumors expressing high levels of TRIM32 were associated with an increased risk of postoperative recurrence, particularly hematogenous recurrence. Multivariate analysis identified TRIM32 status as an independent prognostic factor. Furthermore, TRIM32 gene silencing induced apoptosis and inhibited the proliferation of gastric cancer cells in vitro. Therefore, TRIM32 expression levels may be of potential prognostic value in gastric cancer.

Use of fondaparinux for thromboprophylaxis in an unfractionated heparin-intolerant pregnant woman with thrombotic predisposition.

A 34-year-old primigravida who had undergone thrombectomy for deep venous thrombosis (DVT) in her leg and exhibited low protein S activity, indicating predisposition to thrombosis, developed DVT of the leg. No pulmonary embolism was detected. After anticoagulant therapy with unfractionated heparin was discontinued because of liver dysfunction, danaparoid treatment was administered in hospital. The patient had a normal delivery after 39 weeks' gestation with no recurrence of thrombosis. During her second pregnancy four years later, she gave herself fondaparinux injections. She delivered normally after 38 weeks' gestation without experiencing DVT. Fondaparinux may be a useful anticoagulant for heparin-intolerant pregnant women.

Risk Factors for Postoperative Ascites in Patients Undergoing Liver Resection for Hepatocellular Carcinoma.

BACKGROUND: Postoperative ascites is a common complication after liver resection. This study aimed to identify the risk factors for ascites in patients after liver resection and the relationship between postoperative ascites and other complications. METHODS: We retrospectively analyzed data that were obtained from 266 patients who underwent liver resection for treating hepatocellular carcinoma between 2008 and 2015. Postoperative ascites was defined as a daily ascitic fluid drainage exceeding 500 mL on postoperative day 3 or later. The participants were categorized and analyzed with respect to the presence or absence of postoperative ascites. RESULTS: Overall, 17 (6.4%) patients developed postoperative ascites. A multivariate analysis identified that three significant factors-serum albumin, platelet count, and operation duration-were associated with the development of postoperative ascites. Sixteen (94.1%) of the 17 patients with postoperative ascites experienced other associated complications. The patients with ascites had more pleural effusion (70.6 vs. 17.7%, P < 0.001) than the patients without ascites. Postoperative morbidity, except for pleural effusion, was similar between the groups. The postoperative hospital stay duration was significantly longer in patients with ascites than in those without ascites. CONCLUSIONS: Postoperative ascites frequently occurred in patients with decreased liver functional reserve. Moreover, the presence of ascites was associated with significantly increased pleural effusion rates, and postoperative hospital stay duration was significantly prolonged.

The Administration of Celecoxib as an Analgesic after Liver Resection Is Safe.

BACKGROUND: There are a few studies that have evaluated postoperative analgesia. The aim of this study was to evaluate the safety of administering celecoxib to manage postoperative pain after liver surgery. METHODS: The cases of patients who underwent liver resection at Nara Medical University from April 2008 to December 2015 were retrospectively analyzed. From January 2013 to December 2015, celecoxib was routinely administered (600 mg/day on postoperative day (POD) 2 and 400 mg/day from POD 3-7), whereas celecoxib was not administered from April 2008 to December 2012. The patients' baseline characteristics, the operative procedures, and postoperative complications were analyzed. RESULTS: In total, 207 patients were administered celecoxib (celecoxib group), whereas 246 were not (non-celecoxib group). The preoperative serum total bilirubin and creatinine levels and indocyanine green retention rate at 15 min values of the 2 groups were similar. Similar incidences of overall and major complications (Clavien-Dindo classification ≥grade IIIa) were seen in both groups (33.8 vs. 36.2%, p = 0.601 and 12.1 vs. 12.6%, p = 0.866, respectively). No significant differences in the incidences of gastrointestinal bleeding, acute renal failure, or portal vein thrombosis were observed between the groups. CONCLUSIONS: The use of celecoxib for postoperative analgesia in the early period after liver resection is safe.

Keratin 19 as a key molecule in progression of human hepatocellular carcinomas through invasion and angiogenesis.

BACKGROUND: Keratin (K) 19-positive hepatocellular carcinoma (HCC) is well known to have a higher malignant potential than K19-negative HCC: However, the molecular mechanisms involved in K19-mediated progression of HCC remain unclear. We attempted to clarify whether K19 directly affects cell survival and invasiveness in association with cellular senescence or epithelial-mesenchymal transition (EMT) in K19-positive HCC. METHODS: K19 expression was analysed in 136 HCC surgical specimens. The relationship of K19 with clinicopathological factors and survival was analysed. Further, the effect of K19 on cell proliferation, invasion, and angiogenesis was examined by silencing K19 in the human HCC cell lines, HepG2, HuH-7, and PLC/PRF/5. Finally, we investigated HCC invasion, proliferation, and angiogenesis using K19-positive HCC specimens. RESULTS: Analysis of HCC surgical specimens revealed that K19-positive HCC exhibited higher invasiveness, metastatic potential, and poorer prognosis. In vitro experiments using the human HCC cell lines revealed that K19 silencing suppressed cell growth by inducting apoptosis or upregulating p16 and p27, resulting in cellular senescence. In addition, transfection with K19 siRNA upregulated E-cadherin gene expression, significantly inhibited the invasive capacity of the cells, downregulated angiogenesis-related molecules such as vasohibin-1 (VASH1) and fibroblast growth factor 1 (FGFR1), and upregulated vasohibin-2 (VASH2). K19-positive HCC specimens exhibited a high MIB-1 labelling index, decreased E-cadherin expression, and high microvessel density around cancer foci. CONCLUSION: K19 directly promotes cancer cell survival, invasion, and angiogenesis, resulting in HCC progression and poor clinical outcome. K19 may therefore be a novel drug target for the treatment of K19-positive HCC.

The prognosis of liver resection for patients with four or more colorectal liver metastases has not improved in the era of modern chemotherapy.

BACKGROUND AND OBJECTIVES: The impact of perioperative chemotherapy on patients with multiple colorectal liver metastases (CRLM) remains unclear. We attempted to examine whether the introduction of modern chemotherapies has improved the prognosis of patients that undergo liver resection for ≥4 CRLM. METHODS: Between January 1990 and December 2013, 194 patients underwent liver resection for CRLM at our institution. The outcomes of the patients with ≥4 and 1-3 CRLM were compared before and after 2005, when modern chemotherapies were introduced to Japan. RESULTS: There were 50 and 144 patients with ≥4 (Group 1) and 1-3 (Group 2) CRLM, respectively. The overall survival (OS) rate of Group 1 was significantly worse than that of Group 2 (P = 0.0007). The OS rate of Group 2 was significantly better after 2005 than before 2004 (P = 0.039), while no such differences were observed in Group 1. Multivariate analysis identified three prognostic factors in Group 1: a serum carcinoembryonic antigen level of ≥20 ng/ml (P = 0.018), a serum cancer antigen 19-9 level of ≥100 U/ml (P = 0.018), and a primary colorectal cancer N factor of ≥N2 (P = 0.023). CONCLUSIONS: The prognosis of patients with ≥4 CRLM that undergo liver resection has not improved despite the development of modern chemotherapies. J. Surg. Oncol. 2016;114:959-965. © 2016 Wiley Periodicals, Inc.

Laparoscopic resection of a hepatic mucinous cystic neoplasm: A case report.

INTRODUCTION: We aimed to present a case of hepatic mucinous cystic neoplasm (MCN-H) that was completely resected by laparoscopy. PRESENTATION OF CASE: A 47-year-old female exhibited mild elevation of serum liver enzyme levels. Abdominal computed tomography revealed a 45-mm multilocular cystic tumor in segment IV of the liver, along with intermittent border calcification and minimal wall thickness. Magnetic resonance imaging revealed fluid-to-fluid level in the cystic tumor, thereby increasing the suspicion of a mild hemorrhage. The patient underwent laparoscopic liver resection (LLR) with a diagnosis of suspected mucinous cystic neoplasm of the liver. The entire tumor was successfully resected with a laparoscopic approach. The resected specimen was a 4.2×3.3×2.2-cm cystic tumor. Histological findings revealed mucin-producing singular epithelium and ovarian-like stroma. The tumor was diagnosed as a MCN-H with no malignancy. DISCUSSION: This is the first report in which a MCN-H was completely resected by laparoscopy. MCN-H is rare and is observed in only<5% of liver cystic tumors. MCN-H has been reported to have the malignant potential. And complete resection might be a good treatment option. Along with technical development, LLR has been indicated for benign liver tumors to date. Benign liver tumors are commonly observed in young females. The smaller incisions of the laparoscopic approach might provide cosmetic advantages for patients. CONCLUSION: We presented the first case of a MCN-H completely resected by laparoscopy. Benign tumors and tumors with malignant potential might be good indications for a laparoscopic surgery.

The anatomical location of the pancreas is associated with the incidence of pancreatic fistula after laparoscopic gastrectomy.

BACKGROUND: Postoperative pancreatic fistula (POPF) is one of the major complications after laparoscopic gastrectomy (LG). We investigated the impact of the anatomical location of the pancreas, especially in relation to the suprapancreatic lymph nodes, on the incidence of POPF after LG. METHODS: We retrospectively reviewed the preoperative computed tomography (CT) images of 246 patients who underwent LG with the suprapancreatic lymph node dissection between November 2008 and November 2015. The length between the levels of the pancreatic body surface and the root of the common hepatic artery (LPC) was measured on a CT image with an axial view. A receiver operating characteristics (ROC) curve analysis was performed to determine the cutoff LPC value. A multivariate analysis was performed to determine the predictive factors for POPF. RESULTS: POPF occurred in 11 patients (4.5 %). The median LPC was significantly longer in the patients with POPF than in those without (26 mm vs. 21 mm, p = 0.026). The ROC curve analysis revealed that the optimal cutoff LPC value for predicting POPF was 25 mm. The POPF rate was significantly higher in the long LPC group than in the short LPC group (10 vs. 1.3 %, p = 0.002). A multivariate analysis demonstrated that a long LPC (p = 0.018) and dissection of the lymph nodes along the distal splenic artery (p = 0.042) were independent predictors of POPF. The amylase level in the drainage fluid on postoperative day 1 was significantly higher in the long LPC group than in the short LPC group. CONCLUSIONS: The LPC is a simple and reliable predictor of POPF after LG. Surgeons should take the anatomical location of the pancreas into consideration when performing LG with suprapancreatic lymph node dissection.

Grade B pancreatic fistulas do not affect survival after pancreatectomy for pancreatic cancer: A multicenter observational study.

BACKGROUND: Several studies have demonstrated that postoperative complications after pancreatectomy for pancreatic cancer adversely affect survival. The impact on survival of a pancreatic fistula according to the classification of the International Study Group for Pancreatic Surgery has not been fully evaluated. The aim of this multicenter, observational study was to evaluate the impact of pancreatic fistula on pancreatic cancer patients who had undergone pancreatectomy. METHODS: Between 2001 and 2012, 1,397 patients who underwent pancreatectomy for pancreatic cancer at 7 high-volume centers in Japan were reviewed retrospectively. The impact of pancreatic fistula on survival was evaluated by univariate and multivariate analysis. RESULTS: Pancreatic fistula occurred in 327 of 1,397 patients (23.4%) and was classified based on the International Study Group for Pancreatic Surgery as follows: grade A in 9.9%, grade B in 10.6%, and grade C in 2.9% of the patients. Median survival time in no fistula/grade A, grade B, and grade C were 23.6, 26.0, and 9.0 months, respectively. There was no significant difference in overall survival between patients with no fistula/grade A and those with grade B (P = .403); in contrast, overall survival in patients with grade C was worse than in patients without grade C (P < .001). The multivariate Cox proportional hazard analysis demonstrated that grade C pancreatic fistula was an independent prognostic factor (hazard ratio 1.59; 95% confidence interval, 1.03-2.45; P = .035). CONCLUSION: Grade B pancreatic fistula after pancreatectomy does not adversely affect long-term survival, but a grade C pancreatic fistula has a negative impact on long-term survival of patients with pancreatic cancer.

Outcomes of Laparoscopic Liver Resection for Patients with Large Colorectal Liver Metastases: A Case-Matched Analysis.

BACKGROUND: Despite the expansion of laparoscopic approach in the treatment of liver tumors, limited data have been reported regarding large colorectal liver metastases (CRLMs). This study aimed at assessing the short- and long-term outcomes after laparoscopic liver resection (LLR) for large (≥5 cm) CRLMs. METHODS: This was a case-matched study (1:2) comparing patients with large (group L; ≥5 cm) and small (group S; <5 cm) CRLMs using demographic, tumor, and surgical characteristics as matching variables. Postoperative outcomes and survival data were compared in the 2 groups. RESULTS: Forty patients who underwent LLR for large CRLMs were matched with 80 patients with tumors <5 cm. Major hepatectomy was performed with 75.0 % of patients in Group L and 66.3 % in group S (p = 0.403). Operative time was 300 min in group L and 240 min in group S (p = 0.059). The postoperative mortality and overall morbidity rates were comparable in the 2 groups (p = 1.000 and 0.170, respectively). Postoperative major complication (Dindo-Clavien ≥3) was similar between the two groups (p = 0.072). R0 resection was achieved in 92.5 % in the group L and in 95.0 % in the group S (p = 1.000). The 5-year overall survival and recurrence-free survival were better for group S than for group L (47.3 vs. 35.4 %, p = 0.044 and 27.3 vs. 14.9 %, p = 0.042, respectively). Multivariate analysis identified positive surgical margins and synchronous presentation as prognostic factors. CONCLUSION: Since LLR was performed safely with favorable oncological adequacy in selected patients with large CRLMs, tumor size should not modify the surgical approach.

Factors associated with failure to complete adjuvant chemotherapy in pancreatic cancer.

BACKGROUND: The importance of completing adjuvant chemotherapy in pancreatic cancer is becoming recognized. However, the clinicopathological factors associated with failure to complete adjuvant chemotherapy remain unclear. METHODS: A total of 135 patients were analyzed to identify the factors associated with failure to complete adjuvant chemotherapy. RESULTS: Ninety patients completed planned adjuvant chemotherapy, whereas 45 patients failed to complete adjuvant chemotherapy. Lower preoperative prognostic nutritional index, intraoperative blood transfusion, and organ and/or space surgical site infection, and advanced tumor stage were associated with failure to complete adjuvant chemotherapy. Neoadjuvant chemoradiotherapy was associated with significantly lower prognostic nutritional index, less incidence of organ and/or space surgical site infection, and earlier tumor stage, suggesting the conflicting effects of neoadjuvant chemoradiotherapy on completing adjuvant chemotherapy. CONCLUSIONS: Several clinicopathological factors including patient conditions and perioperative events were associated with failure to complete adjuvant chemotherapy.

Evaluation of the efficacy of daikenchuto (TJ -100) for the prevention of paralytic ileus after pancreaticoduodenectomy: A multicenter, double-blind, randomized, placebo-controlled trial.

BACKGROUND: We assessed the efficacy of TJ-100 taken perioperatively to recovery among patients with periampullary tumor or tumor of the head of the pancreas who underwent pancreaticoduodenectomy (PD). PATIENTS AND METHODS: In this multicenter, randomized, double-blinded, placebo-controlled, phase II trial (JAPAN-PD Study), patients were assigned randomly in a 1:1 ratio to receive TJ-100 or placebo. The coprimary endpoints were (1) incidence of postoperative paralytic ileus lasting >72 hours after surgery and (2) time to occurrence of postoperative paralytic ileus. This trial is registered at the UMIN Clinical Trials Registry (000007975) and at ClinicalTrials.gov (NCT01607307). RESULTS: From August 2012 through July 2013, we assessed 273 patients for eligibility, and 224 underwent randomization; 112 patients received TJ-100, and 112 patients received placebo. The population for analysis consisted of 104 patients who received TJ-100 and 103 who received placebo. Paralytic ileus occurred 35 (33.7%) in the TJ-100 group and 38 (36.9%) in the placebo group (P = .626). Time to first flatus was 2.25 (2.00-2.50) days in the TJ-100 group and 2.50 (1.50-2.50) days in the placebo group (P = .343). Among 23 patients who underwent a pylorus ring-preserving PD, time to first flatus was lower in the TJ-100 group than in the placebo group: 0.50 (0.50-1.00) days versus 1.50 (0.50-3.00) days (P = .034). CONCLUSION: Our findings suggest that use of TJ-100 did not improve recovery from paralytic ileus after PD, and may preclude the routine use of TJ-100 in clinical practice after PD operation.

Do pancrelipase delayed-release capsules have a protective role against nonalcoholic fatty liver disease after pancreatoduodenectomy in patients with pancreatic cancer? A randomized controlled trial.

BACKGROUND: The aim of this randomized controlled trial (RCT) was to investigate whether pancrelipase protects against nonalcoholic fatty liver disease (NAFLD) development after pancreatoduodenectomy in patients with pancreatic cancer better than conventional pancreatic enzyme supplementation. METHODS: A total of 57 patients were randomly assigned to the study group (n = 29; pancrelipase replacement therapy) or the control group (n = 28; conventional pancreatic enzyme supplementation). NAFLD was defined as a liver-to-spleen attenuation ratio less than 0.9 on CT. Clinical and laboratory findings were also assessed. RESULTS: NAFLD was observed in 6/29 patients (21%) in the study group, and 11/28 patients (39%) in the control group, but this was not a statistically significant difference. In the control group, crossover to pancrelipase replacement therapy upon NAFLD diagnosis produced improvement in five out of 10 patients. Multivariate analysis showed that advanced age and extended resection were independent risk factors for NAFLD development. CONCLUSION: This RCT did not show a significant protective effect of pancrelipase replacement therapy over conventional pancreatic enzyme supplementation on NAFLD development after pancreatoduodenectomy for pancreatic cancer. Further studies are clearly required to investigate the etiology of and new therapeutic strategies for treatment-resistant NAFLD (UMIN 000019817).

Adjuvant Hepatic Arterial Infusion Chemotherapy After Resection for Pancreatic Cancer Using Coaxial Catheter-Port System Compared with Conventional System.

PURPOSE: Previous reports have shown the effectiveness of adjuvant hepatic arterial infusion chemotherapy (HAIC) in pancreatic cancer. However, percutaneous catheter placement is technically difficult after pancreatic surgery. The purpose of this study was to evaluate the feasibility and outcome of HAIC using a coaxial technique compared with conventional technique for postoperative pancreatic cancer. MATERIALS AND METHODS: 93 consecutive patients who received percutaneous catheter-port system placement after pancreatectomy were enrolled. In 58 patients from March 2006 to August 2010 (Group A), a conventional technique with a 5-Fr indwelling catheter was used and in 35 patients from September 2010 to September 2012 (Group B), a coaxial technique with a 2.7-Fr coaxial catheter was used. RESULTS: The overall technical success rates were 97.1 % in Group B and 86.2 % in Group A. In cases with arterial tortuousness and stenosis, the success rate was significantly higher in Group B (91.7 vs. 53.8 %; P = 0.046). Fluoroscopic and total procedure times were significantly shorter in Group B: 14.7 versus 26.7 min (P = 0.001) and 64.8 versus 80.7 min (P = 0.0051), respectively. No differences were seen in the complication rate. The 1 year liver metastasis rates were 9.9 % using the conventional system and 9.1 % using the coaxial system (P = 0.678). The overall median survival time was 44 months. There was no difference in the survival period between two systems (P = 0.312). CONCLUSIONS: The coaxial technique is useful for catheter placement after pancreatectomy, achieving a high success rate and reducing fluoroscopic and procedure times, while maintaining the safety and efficacy for adjuvant HAIC in pancreatic cancer.

Prognosis after surgical treatment for pancreatic cancer in patients aged 80 years or older: a multicenter study.

BACKGROUND: The optimal therapeutic strategy for very elderly pancreatic cancer patients remains to be determined. The aim of this study was to clarify the role of pancreatic resection in patients 80 years of age or older. METHODS: A retrospective multicenter analysis of 1401 patients who had undergone pancreatic resection for pancreatic cancer was performed. The patients aged ≥ 80 years (n = 99) were compared with a control group <80 years of age (n = 1302). RESULTS: There were no significant differences in the postoperative complications and mortality between the two groups. However, the prognosis of octogenarians was poorer than that of younger patients for both resectable and borderline resectable tumors. Importantly, there were few long-term survivors in the elderly group, especially among those with borderline resectable pancreatic cancer. A multivariate analysis of the prognostic factors in the very elderly patients indicated that the completion of adjuvant chemotherapy was the only significant factor. In addition, preoperative albumin level was the only independent risk factor for a failure to complete adjuvant chemotherapy. CONCLUSION: This study demonstrates that the postoperative prognosis in octogenarian patients was not good as that in younger patients possibly due to less frequent completion of adjuvant chemotherapy.