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01.06.2010 | Pancreatic Tumors | Ausgabe 6/2010

Annals of Surgical Oncology 6/2010

Parenchyma-Preserving Resections for Small Nonfunctioning Pancreatic Endocrine Tumors

Zeitschrift:
Annals of Surgical Oncology > Ausgabe 6/2010
Autoren:
MD Massimo Falconi, MD Alessandro Zerbi, MD Stefano Crippa, MD Gianpaolo Balzano, MD Letizia Boninsegna, MD Vanessa Capitanio, MD Claudio Bassi, MD Valerio Di Carlo, MD Paolo Pederzoli
Wichtige Hinweise
Paolo Pederzoli and Valerio Di Carlo contributed equally to this article.

Abstract

Background

Parenchyma-preserving resections (PPRs), including enucleation and middle pancreatectomy (MP), are accepted procedures for insulinomas, but their role in the treatment of nonfunctioning pancreatic endocrine tumors (NF-PETs) is debated. The aim of this study was to evaluate perioperative and long-term outcomes after PPRs for NF-PETs.

Methods

All patients who underwent PPRs for NF-PETs between 1990 and 2005 were included. Patients with multiple endocrine neoplasia type 1 were excluded.

Results

Overall, 50 patients (23 men, 27 women, median age 59 years) underwent 26 enucleations and 24 MP. A total of 58% of NF-PETs were incidentally discovered. Median size of the tumors was 13.5 mm with no preoperative suspicion of malignancy in all patients. Overall morbidity and pancreatic fistula rates were 58 and 50%, respectively. Reoperation rate was 4%, with no mortality. Postoperative complications were higher in the MP group. At pathology, there were 34 (68%) benign lesions, 13 (26%) neoplasms of uncertain behavior, and 3 (6%) well-differentiated carcinomas. Forty-one patients (82%) had tumors ≤2 cm in size. Only eight patients (16%) had at least one lymph node removed. After a median follow-up of 58 months, no patient died of disease. Overall, four patients (8%) experienced tumor recurrence after a mean of 68 months. The incidence of exocrine/endocrine insufficiency was 8%.

Conclusions

PPRs are generally safe and effective procedures for treating small NF-PETs. However, better selection criteria must be identified, and lymph node sampling should be performed routinely to avoid understaging. Long-term follow-up evaluation (>5 years) is of paramount importance given the possible risk of late recurrence.

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