Published in:
01-12-2019 | Pancreatic Cancer | Original Article
Outcomes in patients with pancreatic cancer as a secondary malignancy: a retrospective single-institution study
Authors:
Sojun Hoshimoto, Shoichi Hishinuma, Hirofumi Shirakawa, Moriaki Tomikawa, Iwao Ozawa, Yoshiro Ogata
Published in:
Langenbeck's Archives of Surgery
|
Issue 8/2019
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Abstract
Purpose
This study aimed to evaluate the clinicopathological features and oncological outcomes of pancreatic cancer (PC) patients with prior malignancies (2nd primary PC) compared with those of patients without any prior malignancies in their history (1st primary PC).
Methods
We retrospectively reviewed clinical data from 185 PC patients undergoing surgical resection. Patients were divided into the 1st and 2nd primary PC groups.
Results
Forty-three patients (23.2%) had a history of prior malignancy. The 2nd primary PC group was significantly older than the 1st primary PC group (mean, 72.1 vs. 65.9 years, respectively, P < 0.001) and was more frequently asymptomatic compared to the 1st primary PC group (67.4 vs. 31.0%, respectively, P < 0.001). The tumor size was larger, and extrapancreatic nerve plexus invasion, venous invasion, and lymph node metastasis were more frequently observed in the 1st primary PC group. The rate of adjuvant therapy administration was lower in 2nd primary PC patients (72.5 vs. 51.2%, P = 0.009). In the survival analysis, no significant difference in overall or disease-free survival was found between the two groups (16.8 vs. 16.4 months, P = 0.725, and 8.7 vs. 9.3 months, P = 0.284, respectively).
Conclusion
Despite significant surveillance bias, such as earlier detection in 2nd primary PC, the outcomes of patients with 2nd primary PC were comparable to those of patients with 1st primary PC. Further investigation with a larger sample size and matching for patient age and tumor stage in both groups is needed to elucidate the biological features of 2nd primary PC.