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  • Title: Multimodality management, recurrence patterns, and long-term outcome of gastroenteropancreatic neuroendocrine neoplasms: Progress over 17 years.
    Author: Desai GS, Pande P, Chhabra V, Shah RC, Jagannath P.
    Journal: Indian J Gastroenterol; 2019 Oct; 38(5):399-410. PubMed ID: 31802438.
    Abstract:
    BACKGROUND: Many advances in the management of gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) happened in the last two decades. This study highlights the progress in its management over 17 years, outcomes, recurrence patterns, and follow up protocols. METHODS: This retrospective analysis of prospectively maintained database at a single tertiary center included GEP-NEN patients from January 2001 to August 2017. Management protocols were based on European Neuroendocrine Tumor Society guidelines. Recurrences were categorized as follows: localized nodal, regional, distant hepatic, or combined. Patients were divided into cohorts: cohort 1 (2001-2006), cohort 2 (2007-2011), and cohort 3 (2012-2017). Survival patterns were analyzed. RESULTS: One hundred and ninety-two patients were included with 98 (51.04%) grade (G) 1, 64 (33.34%) G2, and 30 (15.63%) G3. One hundred and four (54.16%) underwent curative surgery (58 G1, 27 G2, and 19 G3). Overall follow up ranged from 3 to 276 months; 39 were lost to follow up. Ninety-six patients had recurrences: 44 regional + distant and 40 liver-limited recurrences. One-, 3-, and 5-year survivals show significant differences among different treatment groups (p < 0.05). Significant increase in curative resections, chemotherapy utilization, and reduced recurrences were noted in cohort 3. Curative (R0) resection offered 1- and 3-year overall survival of 93.3% and 66.7% in cohort 1; 95.8% and 83.1% in cohort 2; and 100% and 92.9% in cohort 3. CONCLUSION: Curative resection is the most significant factor for improved survival. Debulking surgerical procedure have a role whereas upfront peptide receptor radionuclide therapy is questionable. Chemotherapy improves overall survival in inoperable/metastatic setting. Recurrence patterns indicate that a long-term follow up greater than 10 years is necessary.
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