Factors Associated With Long-Term Survival in Gemcitabine-Concurrent Proton Radiotherapy For Non-Metastatic Locally Advanced Pancreatic Cancer: a Single-Center Retrospective Study

Abstract Background: Factors associated with long-term survival in gemcitabine-concurrent proton radiotherapy (GPT) for non-metastatic locally advanced pancreatic cancer (LAPC) remain unclear. This study aimed to determine the factors associated with long-term survival in GPT for non-metastatic LAPC.Methods: The medical records of 123 patients with LAPC treated with GPT between February 2009 and December 2019 at Hyogo Ion Beam Medical Center were retrospectively reviewed to assess the factors associated with long-term survival outcomes.Results: The median survival time of the total cohort treated with GPT was 18.7 months. The 1- and 2-year overall, local progression-free, and progression-free survival rates were 70.4% and 35.7%, 78.2% and 59.0%, and 38.6% and 20.8%, respectively. Multivariate analysis revealed that LAPCs at the pancreatic body-tail and those without anterior peripancreatic invasion were independently associated with longer overall survival (P = 0.040 and P = 0.015, respectively). The median survival times of patients with LAPC at the pancreatic body-tail and those with LAPC without anterior peripancreatic invasion were 24.1 and 28.1 months, respectively. LAPCs at the pancreatic body-tail had a higher volume ratio irradiated over 60 Gy equivalents at gross tumor volume than those at the pancreatic head (P < 0.001). LAPCs with anterior peripancreatic invasion had more peritoneal recurrence within 6 months than those without anterior peripancreatic invasion (P = 0.039).Conclusions: GPT is a promising treatment option for patients with LAPC at the pancreatic body-tail and those with LAPC without anterior peripancreatic invasion.

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Prognostic factors associated with long term survival in chemotherapy-treated advanced pancreatic cancer: A Canadian multicenter analysis.

Journal of Clinical Oncology ◽

10.1200/jco.2019.37.4_suppl.416 ◽

2019 ◽

Vol 37 (4_suppl) ◽

pp. 416-416

Author(s):

Christina Kim ◽

Shahid Ahmed ◽

Dawn Elizabeth Armstrong ◽

Tayyba Baig ◽

Miguel Cardoso ◽

...

Keyword(s):

Pancreatic Cancer ◽

Logistic Regression ◽

Primary Tumor ◽

Advanced Pancreatic Cancer ◽

Term Survival ◽

Long Term Survival ◽

Factors Associated ◽

Multivariable Logistic Regression ◽

Head Of The Pancreas

416 Background: The outcomes of patients (pts) with advanced pancreatic cancer (APC) are poor. With the use of currently available multi-agent regimens, median overall survival (mOS) remains < 12 months. Select pts, however, experience a protracted survival. Little is known about the clinical, pathologic and treatment characteristics associated with long term survival (LTS) in APC. Methods: Pooled individual level data from six Canadian cancer centers of pts diagnosed with APC from 2012 to 2016 who received at least one cycle of chemotherapy (CT) were analyzed. Clinical, pathologic and treatment characteristics, as well as survival, were compared between pts who lived < and ≥ 18 months. Multivariable logistic regression was used to identify independent predictors of survival. Results: Of 455 pts, 96% had metastatic disease and 88 (19%) survived ≥ 18 months. Compared to pts who survived < 18 months, those with LTS had lower WBC (p = 0.0025), CA 19-9 (p < 0.001), ALP (p < 0.001) and LDH (p = 0.007) at baseline. Pts with LTS also had higher albumin (p < 0.001) and BMI (p = 0.0268). In addition, they had better ECOG (p < 0.001) and were more likely to have tumors in the head of the pancreas (p = 0.0204). LTS pts were more likely to have a complete response (CR) or partial response (PR) to 1L CT (p < 0.001). The mOS seen with LTS was 29.2 months, compared to 4.3 months (p < 0.001). On multivariable logistic regression, independent predictors of LTS included: primary tumor in the head of the pancreas (OR 3.42 95% CI 1.2-9.76); experiencing a CR or PR to 1L CT (OR 9.19 95% CI 3.78-22.32); and receipt of 2L doublet CT (OR 2.72 95% CI 1.05 to 7.08). Conversely, factors associated with lower likelihood of LTS included: ECOG ≥ 2 (OR 0.32 95% CI 0.11-0.95); and elevated CA 19-9 (OR 0.43 95% CI 0.21-0.9). Conclusions: A select proportion of pts with APC experience LTS and have clinical features which differentiate them from those without LTS. The use of performance status, primary tumor location, pre-treatment CA 19-9, 2L CT type and radiologic response may help identify LTS and inform discussions regarding treatment and prognosis.

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Effect of dose-escalation of IMRT for unresectable pancreatic cancer 1 cm away from the luminal mucosa on long-term survival.

Journal of Clinical Oncology ◽

10.1200/jco.2015.33.3_suppl.354 ◽

2015 ◽

Vol 33 (3_suppl) ◽

pp. 354-354 ◽

Cited By ~ 1

Author(s):

Christopher H. Crane ◽

Awalpreet Singh Chanda ◽

Eugene Jon Koay ◽

Gauri R. Varadhachary ◽

Prajnan Das ◽

...

Keyword(s):

Pancreatic Cancer ◽

Induction Chemotherapy ◽

Locally Advanced ◽

Advanced Pancreatic Cancer ◽

Breath Hold ◽

Tumor Control ◽

High Dose ◽

Term Survival ◽

Long Term Survival

354 Background: The use of chemoradiation (CXRT) for locally advanced pancreatic cancer (LAPC) is controversial. Delivery of high doses of RT capable of leading to local tumor control is challenging. We reviewed outcomes of treatement with dose-escalated IMRT with curative intent. Methods: Of 211 patients treated from 5/2006 to 8/2014 with CXRT for LAPC, 49(23%) had tumors > 1 cm from the luminal organs ere selected for dose-escalated IMRT using integrated boost (SIB) technique, inspiration breath hold, and computed tomographic (CT) image guidance. Fractionation was optimized for coverage of gross tumor (GTV,Table 1). A 2-5mm margin on the GTV, was treated as an SIB within a microscopic dose. Forty-seven (96%) patients received a median of 4.0 months of induction chemotherapy and 45 (92%) received concurrent capecitabine or gemcitabine. Results: Mean GTV coverage was 86% (95% CI 78% to 94%). Median FU was 32 mo. Median OS and 1, 2, 3 and 5 year OS rates were 22.6mo (95% CI 16.4 to 43.9mo), 83%, 49%,38%, and 18% from the date of diagnosis and 17.8mo, 63%, 38%, 33%, and 18% from the start of RT. Degree of GTV coverage and Biological Equivalent Dose (BED) did not appear to affect outcome. Freedom from progression at 3 y were 40.6% (local) and 37.1% (distant). Acute toxicity was uncommon: grade 2 pain, diarrhea, anorexia, nausea or fatigue in 18 (37%), and grade 3 diarrhea in one patient (2%). Four patients (13%) required transfusion for anemia. One patient had a GI bleed possibly related to treatment. Conclusions: Dose-escalated IMRT across a BED range of 70-100Gy for inoperable patients selected with induction chemotherapy appears well tolerated and may improve the likelihood of long term survival. These results are similar to the best outcomes reported for patients after surgical resection. Incomplete high-dose GTV coverage does not appear to be detrimental. A randomized phase II trial is testing IMRT (RTOG 1201, 63Gy/28fx, with stratification by SMAD4 expression). [Table: see text]

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Current State of Vascular Resections in Pancreatic Cancer Surgery

Gastroenterology Research and Practice ◽

10.1155/2015/120207 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 22

Author(s):

Thilo Hackert ◽

Lutz Schneider ◽

Markus W. Büchler

Keyword(s):

Pancreatic Cancer ◽

Adjuvant Treatment ◽

Locally Advanced ◽

Neoadjuvant Treatment ◽

Treatment Strategies ◽

Western World ◽

Term Survival ◽

Long Term Survival ◽

Current State

Pancreatic cancer (PDAC) is the fourth leading cause of cancer-related mortality in the Western world and, even in 2014, a therapeutic challenge. The only chance for long-term survival is radical surgical resection followed by adjuvant chemotherapy which can be performed in about 20% of all PDAC patients by the time of diagnosis. As pancreatic surgery has significantly changed during the past years, extended operations, including vascular resections, have become more frequently performed in specialized centres and the border of resectability has been pushed forward to achieve a potentially curative approach in the respective patients in combination with neoadjuvant and adjuvant treatment strategies. In contrast to adjuvant treatment which has to be regarded as a cornerstone to achieve long-term survival after resection, neoadjuvant treatment strategies for locally advanced findings are currently under debate. This overview summarizes the possibilities and evidence of vascular, namely, venous and arterial, resections in PDAC surgery.

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