scholarly journals Prognosis and feasibility ofen-blocvascular resection in stage II pancreatic adenocarcinoma

2010 ◽  
Vol 16 (8) ◽  
pp. 997 ◽  
Author(s):  
K Dilip Chakravarty
Keyword(s):  
Pancreatic Adenocarcinoma ◽  
Stage Ii

An assessment of the impact of geographic variation on resection rates and survival for early-stage pancreatic adenocarcinoma.

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. e15052-e15052
Author(s):  
Bradley D. McDowell ◽  
Brian J. Smith ◽  
Anna M Button ◽  
James R. Howe ◽  
Elizabeth A. Chrischilles ◽  
...  
Keyword(s):  
Pancreatic Cancer ◽  
Overall Survival ◽  
Pancreatic Adenocarcinoma ◽  
Early Stage ◽  
Stage I ◽  
Stage Ii ◽  
Survival Times ◽  
Resection Rate ◽  
Selection Factors ◽  
The Impact

e15052 Background: Pancreatic resection is the only known curative option for pancreatic adenocarcinoma. Resection has been previously reported to be underutilized in patients with early stage disease. To develop a better understanding of this issue and control for treatment selection factors, we examined the relationship between geographic area resection rates and survival in patients with stage I/II pancreatic cancer. Methods: We queried Surveillance, Epidemiology, and End Results (SEER) data for patients with stage I/II cancer of the pancreatic head diagnosed from 2004-2009. We excluded patients with less than 3mo survival. Resection rates were calculated within Health Service Areas (HSAs) across all 18 SEER regions. Resection rate was defined as the number of patients who had an operation divided by the total number diagnosed with early stage pancreatic cancer. Multivariate Cox regression was used to estimate the overall survival effect of HSA rates while controlling for age, gender, marital status, poverty level, education, and AJCC stage. Results: 8,323 patients with stage I (n=1,454) and stage II (n=6,869) disease were analyzed. Pancreatectomy was performed in 476 patients (32.7%) with stage I disease and 3,846 (56.0%) with stage II disease. HSA resection rates were arranged into five groups (quintiles) which ranged from 42.7 to 65.7% (Table). Across the quintiles, median overall survival increased from 11 to 14 months, suggesting a positive association with resection rate. Multivariate analysis revealed that for every 10.00% increase in resection rate, the risk of overall death decreased by 5.26% (p<0.001). Conclusions: Patients with early stage pancreatic cancer who live in areas with higher resection rates have longer average survival times. Because geography should not influence treatment response, we conclude that efforts to raise resection rates should increase survival times in patients for whom there is uncertainty about the risk/benefits of resection. [Table: see text]

Revisiting the prognostic significance of positive peritoneal cytology in pancreatic cancer.

2012 ◽  
Vol 30 (4_suppl) ◽  
pp. 177-177
Author(s):  
Kathryn T. Chen ◽  
Smit Singla ◽  
Pavlos Papavasiliou ◽  
Karthik Devarajan ◽  
John Parker Hoffman
Keyword(s):  
Pancreatic Cancer ◽  
Neoadjuvant Therapy ◽  
Pancreatic Adenocarcinoma ◽  
Metastatic Disease ◽  
Prognostic Significance ◽  
Stage Ii ◽  
Peritoneal Cytology ◽  
Cart Analysis ◽  
Significant Difference ◽  
Positive Peritoneal Cytology

177 Background: Positive peritoneal cytology (PPC) in the setting of pancreatic cancer predicts a poor prognosis, such that it is considered metastatic disease in the American Joint Commission on Cancer staging guidelines. We re-evaluate the role of PPC, with particular attention to outcomes following neoadjuvant therapy. Methods: We retrospectively identified 185 patients from January 1, 2000 to present with the diagnosis of pancreatic adenocarcinoma who had undergone peritoneal washings with cytology at the time of planned resection. Data regarding demographics, tumor stage, intraoperative cytology, surgical and chemoradiation therapeutics, and clinicopathological outcomes were analyzed, with the primary endpoints being disease-free and overall survival (DFS and OS). Results: 20 patients (11%) had PPC at the time of planned resection; of these, 11 patients (55%) received neoadjuvant therapy prior to surgery. 165 patients (89%) had negative peritoneal cytology (NPC) at the time of planned resection; of these, 75 (45%) received neoadjuvant therapy prior to surgery. All patients proceeded with resection in the absence of visible metastatic disease. 42% of NPC reached 2-year survival compared to just 20% of patients with PPC. Overall, patients with PPC vs. NPC had significantly poorer DFS (p<0.0064) and OS (p<0.0135). When stratifying by neoadjuvant therapy, in those patients with stage II disease or higher who did not receive neoadjuvant therapy, multivariable CART analysis revealed that PPC predicted poorer DFS compared with NPC (p<0.004). However, among stage II or higher disease receiving neoadjuvant therapy, it failed to show a significant difference in DFS or OS between PPC and NPC. Conclusions: Overall, patients with positive peritoneal cytology are shown to have worse DFS and OS compared to patients with negative peritoneal cytology in pancreatic adenocarcinoma. However, after multivariable analysis, the prognostic significance of positive peritoneal cytology disappears in those patients with stage II and higher disease receiving neoadjuvant therapy.

Effect of surgical resection on survival following neoadjuvant chemotherapy in patients with stage I-II pancreatic adenocarcinoma.

2018 ◽  
Vol 36 (4_suppl) ◽  
pp. 255-255
Author(s):  
Ryan James Henrix ◽  
Eva Rouanet ◽  
Kurt Schultz ◽  
Tasneem Ali ◽  
Bradley Alan Switzer ◽  
...  
Keyword(s):  
Neoadjuvant Chemotherapy ◽  
Pancreatic Adenocarcinoma ◽  
Survival Benefit ◽  
Large Scale ◽  
Medical Center ◽  
Stage I ◽  
Stage Ii ◽  
Stage Iii ◽  
Curative Surgery ◽  
The Impact

255 Background: Pancreatic adenocarcinoma (PDAC) is a lethal malignancy, representing the 4th leading cause of cancer deaths. Our 2011 institutional protocol guides that patients with Stage I/II PDAC receive neoadjuvant chemotherapy (FOLFIRINOX or gemcitabine- nab-paclitaxel); a similar protocol is followed with patients with Stage III disease. The aim of the study is to determine if potentially curative surgery provides added survival benefit, compared to neoadjuvant chemotherapy alone. Methods: Patients who received neoadjuvant chemotherapy and who were diagnosed with stage I-III PDAC from 2011-2017 at a tertiary medical center were included in this prospectively-collected, retrospective analysis. The primary endpoint was overall survival (OS). Kaplan-Meier curves are compared using Log-rank. Cox proportional hazards were used to adjust for confounders. Results: 105 patients met inclusion criteria: 38 (36%) had Stage I disease (n = 18 had neoadjuvant chemotherapy and surgery [N+S], n = 20 had neoadjuvant chemotherapy [N] alone), 44 (42%) had stage II (N+S n = 20, N n = 24), 23 (22%) had stage III (N+S n = 4, N n = 19). There was no difference in 5-year OS regardless of treatment regimen in patients with Stage I (median OS N+S 22.5 mo vs N 27.9 mo; p = 0.99, HR 1.00, 95%CI 0.74-1.35) or Stage II disease (median OS N+S 28.7 mo vs N 27.6 mo; p = 0.69; HR 1.06, 95%CI 0.79-1.41). There is a trend towards improved OS with N+S in those with Stage III disease (median OS N+S 46.0 mo vs N 14.5 mo, p = 0.08), but the number who underwent resection is low (17%), limiting this analysis. Conclusions: In patients with Stage I-II PDAC, potentially curative surgery may not provide additional survival benefit beyond that afforded by modern day neoadjuvant chemotherapy. Stage III outcomes are limited by small numbers, and the impact of surgery is unclear. It may be possible that the locally unresectable tumor that is rendered resectable with neoadjuvant chemotherapy may be associated with a more favorable biology, such that surgery offers added survival benefit. Additional large-scale trials are needed to confirm whether newer therapies may obviate the need for resection in select patients.

Neoadjuvant Radiotherapy is Associated With Improved Pathologic Outcomes and Survival in Resected Stage II-III Pancreatic Adenocarcinoma Treated With Multiagent Neoadjuvant Chemotherapy in the Modern Era

2021 ◽  
pp. 000313482110385
Author(s):  
Jonathan J. Hue ◽  
Jennifer Dorth ◽  
Kavin Sugumar ◽  
Jeffrey M. Hardacre ◽  
John B. Ammori ◽  
...  
Keyword(s):  
Overall Survival ◽  
Neoadjuvant Chemotherapy ◽  
Pancreatic Adenocarcinoma ◽  
Clinical Stage ◽  
Multivariable Analysis ◽  
Postoperative Mortality ◽  
Stage Ii ◽  
Neoadjuvant Radiotherapy ◽  
Resected Stage ◽  
Modern Era

Background Neoadjuvant chemotherapy (CT) is being utilized more frequently in patients diagnosed with localized pancreatic cancer. The role of additional neoadjuvant radiotherapy (RT) remains undefined. We explored outcomes associated with neoadjuvant RT in the modern era. Methods The National Cancer Database (2010-2017) was queried for patients with clinical stage II-III pancreatic adenocarcinoma who received neoadjuvant multiagent systemic CT +/− RT. Demographics, pathologic outcomes, postoperative outcomes, and overall survival were compared. Results A total of 5245 patients were included, of whom 3123 received CT and 1941 received CT + RT. Use of RT decreased over the 8-year study period. On multivariable analysis, treatment at academic facilities (odds ratio (OR) = 1.52, P < .001) and clinical T4 tumors (OR = 1.68, P < .001) were independently associated with receipt of RT. Patients treated with CT + RT had a higher frequency of ypT0-T2 tumors (35.8% vs. 22.7%) and a lower rate of ypT3-T4 tumors (57.3% vs. 72.8%; P < .001), lower rate of node-positive disease (36.6% vs. 59.8%, P < .001), and margin-positive resections (13.8% vs. 20.2%, P < .001), but slightly higher 90-day postoperative mortality (4.9% vs. 3.6%, P = .04). Neoadjuvant chemotherapy+ RT was associated with longer overall survival (32.7 vs. 29.8 months, P = .008), and remained independently associated with survival on multivariable analysis (HR = .85, P < .001). Discussion In patients with stage II-III pancreatic adenocarcinoma, the addition of neoadjuvant RT to multiagent neoadjuvant CT may be associated with increased rates of node-negative and margin-negative resection, as well as improved overall survival.

Bright field and weak-beam images of dislocations gliding on (001) planes in F.C.C. metals

1978 ◽  
Vol 36 (1) ◽  
pp. 352-353
Author(s):  
H. P. Karnthaler ◽  
A. Korner
Keyword(s):  
Single Crystals ◽  
Dislocation Structure ◽  
Room Temperature ◽  
Stage Ii ◽  
Bright Field ◽  
Weak Beam ◽  
Standard Orientation

In f.c.c. metals slip is observed to occur generally on {111} planes. Glide dislocations on intersecting {111} planes can react with each other and form Lomer-Cottrell locks which lie along a <110> direction and are sessile since they are split on two {111} planes. Cottrell already pointed out that these dislocations could glide on {001} planes if they were not split. The first study of this phenomenon has been published recently. It is the purpose of this paper to report some interesting new details of the dislocations gliding on {001} planes in pure Ni, Cu, and Ag deformed at room temperature.Single crystals are grown with standard orientation and strained into stage II. The crystals are sliced parallel to the (001) planes. The dislocation structure is studied by TEM and the Burgers vectors ḇ and glide planes of the dislocations are determined unambiguously.In Fig.l primary P and secondary S dislocations react and form composite dislocations K.

Antiangiogenic gene therapy delays growth of murine and human pancreatic adenocarcinoma in mice

2001 ◽  
Vol 120 (5) ◽  
pp. A349-A349
Author(s):  
J TSENG ◽  
F FARNEBO ◽  
O KISKER ◽  
C BECKER ◽  
C KUO ◽  
...  
Keyword(s):  
Gene Therapy ◽  
Pancreatic Adenocarcinoma ◽  
Human Pancreatic Adenocarcinoma
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