This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. AbstractPrimary UPS of the lung, so-called MFH, is a rare aggressive neoplasm and known to be a high risk of recurrence and metastasis. Surgical resection without residual tumor is the main option of treatment and the best chance for long-term survival. K E Y W O R D Slobectomy, lung, malignant fibrous histiocytoma, undifferentiated pleomorphic sarcoma

Purpose As the number of long-term survivors of pancreatic cancer is expected to increase thanks to recent advances in multidisciplinary treatment and earlier diagnoses of pancreatic cancer, we are likely to encounter more cases of postoperative pulmonary nodules. We analyzed the clinical course and prognosis of resection of pulmonary metastases from pancreatic cancer to clarify the prognostic implication of pulmonary metastasectomy for pancreatic cancer. Method We retrospectively analyzed 35 patients who underwent resection of lung metastases after pancreatic cancer surgery. Short- and long-term outcomes and factors associated with the prognosis were analyzed. Results The observation period was 20 (range, 1–101) months, with 3- and 5-year survival rates of 88.3% and 64.5% from pancreatectomy and 44.1% and 28.3% from lung resection, respectively. A univariate analysis revealed that a period from pancreatic cancer resection to pulmonary nodule shadow detection of < 15 months was associated with a significantly lower overall survival from pancreatic resection than a longer period. Conversely, histological type, stage, size of lung metastases, and resection technique were not associated with the overall survival. Conclusion A long-term prognosis may be expected in some cases with a disease-free interval of ≥ 15 months. Our findings suggest that the disease-free interval may influence the prognosis.

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