Purpose
To examine the efficacy of adjuvant chemoradiotherapy after pancreaticoduodenectomy (PD) for pancreatic adenocarcinoma (PC) in patients undergoing resection at Johns Hopkins Hospital (JHH; Baltimore, MD).
Patients and Methods
Between August 30, 1993, and February 28, 2005, a total of 908 patients underwent PD for PC at JHH. A prospective database was reviewed to determine which patients received fluorouracil (FU) -based CRT. Excluded patients had metastatic disease, died 60 or fewer days after PD, received preoperative therapy, an experimental vaccine, adjuvant chemotherapy or radiation alone. The final cohort includes 616 patients.
Results
The median follow-up was 17.8 months (interquartile range, 9.7 to 33.5 months). Overall median survival was 17.9 months (95% CI, 16.3 to 19.5 months). Groups were similar with respect to tumor size, nodal status, and margin status, but the CRT group was younger (P < .001), and less likely to present with a severe comorbid disease (P = .001). Patients with carcinomas larger than 3 cm (P = .001), grade 3 and 4 (P < .001), margin-positive resection (P = .001), and complications after surgery (P = .017) had poor long-term survival. Patients receiving CRT experienced an improved median (21.2 v 14.4 months; P < .001), 2-year (43.9% v 31.9%), and 5-year (20.1% v 15.4%) survival compared with no CRT. After controlling for high-risk features, CRT was still associated with improved survival (relative risk = 0.74; 95% CI, 0.62 to 0.89).
Conclusion
These data suggest that adjuvant concurrent FU-based CRT significantly improves survival after PD for PC when compared with patients not receiving CRT. These data support the use of combined adjuvant CRT for PC.
Background
Identifying pancreatic cancer patients at high risk of early mortality following pancreaticoduodenectomy (PD) is important for treatment decisions in a multidisciplinary setting. This study examines the preoperative predictors of early mortality following PD and combines these variables into an early mortality risk score (EMRS).
Methods
Medical records of patients who underwent PD for pancreatic adenocarcinoma at the Johns Hopkins Hospital between 30 August 1993 and 28 February 2005 were reviewed. Cox proportional hazards analysis was performed to identify predictors of early mortality, defined as death at 9 and 12 months. EMRS was constructed from univariate associated risk factors (age >75 years, tumor size ≥3cm, poor differentiation, co-morbid diseases) with each factor assigned 1 point (range of 0–4). EMRS was evaluated as an independent predictor of death at 9 and 12 months.
Results
On univariate analysis, risk factors for death at 9 months included age ≥75 years (RR, 1.6; p=.009), comorbid disease (RR, 1.5; p=0.020), tumor ≥3 cm (RR, 1.4; P=0.050), and poor differentiation (RR, 2.1; P<0.001). EMRS was associated with early mortality among those who did (p=0.038) and did not receive adjuvant treatment (p<0.001). A modified EMRS without tumor differentiation was also associated with early mortality (p<0.001). Results persisted when reanalyzed using death at 12 months.
Conclusions
EMRS may identify patients at risk of early mortality following PD who may be candidates for alternatively sequenced treatment protocols. Prospective validation of this EMRS is needed.
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