Gastroenteropancreatic Neuroendocrine Tumors: Demographical, Clinicopathological, and Survival Data From Azerbaijan

Objectives: Neuroendocrine neoplasms consist of both well-differentiated neuroendocrine tumors and poorly differentiated neuroendocrine carcinomas.[1] The study aims to report the demographic, clinical, pathological, and survival characteristics of patients with GEP-NETs.
Methods: Patients diagnosed with histologically confirmed GEP-NETs between 2018 and 2023 at the Liv Bona Dea International Hospital, Baku, Azerbaijan, were included in the study. Patient data, including clinical and histopathological characteristics, including age, gender, tumor location, clinical symptoms, type of treatment, ki-67 index, grade, and outcomes, were collected.
Results: A total of 51 patients were included in the study. The follow-up period of the patients varied from 3 to 74 months. The most frequent tumor location of the GEP-NETs was pancreas 19 (37%). Most of the tumors were non-functional (n=44, 85%), only a few showed functionality (n=7, 15%). Ki-67 index was high (>20%) in 6 (12%) of the patients. Eighteen of our patients had distant metastasis at the time of diagnosis (35%). The most common site for metastasis was liver (n=17, 33%).
Conclusion: To conclude, the high ki-67 index, functional tumor, high grade, and the presence of distant metastasis negatively affected the survival of GEP-NET patients in our setting.
1. Pavel M, Öberg K, Falconi M, Krenning EP, Sundin A, Perren A, et al. Gastroenteropancreatic neuroendocrine neoplasms: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up. Ann Oncol 2020;31:844–60.
2. Sekerci A, Turk HM, Demir T, Seker M, Akcakaya A, Arici DS. Clinicopathological features of gastroenteropancreatic neuroendocrine neoplasms. J Coll Physicians Surg Pak 2020;30:863–7.
3. Fang JM, Li J, Shi J. An update on the diagnosis of gastroenteropancreatic neuroendocrine neoplasms. World J Gastroenterol 2022;28:1009–23.
4. Bozkurt Duman B, Ata S, Köseci T, Bayram E, Çil T, Abidin Z. Clinicopathological features of gastroenteropancreatic neuroendocrine tumors: A retrospective evaluation of 149 cases. Eurasian J Med Invest 2022;6:222–6.
5. Jiao X, Li Y, Wang H, Liu S, Zhang D, Zhou Y. Clinicopathological features and survival analysis of gastroenteropancreatic neuroendocrine neoplasms: A retrospective study in a single center of China. Chin J Cancer Res 2015;27:258–66.
6. Akın Telli T, Esin E, Yalçın Ş. Clinicopathologic features of gastroenteropancreatic neuroendocrine tumors: A single-center experience. Balkan Med J 2020;37:281–6.
7. Bazarbashi S, Aseafan M, Elgazzar T, Alkhayat M, Alghabban A, Abdelgawad MI, et al. Characteristics and treatment results of patients with gastroenteropancreatic neuroendocrine tumors in a tertiary care centre. BMC Endocr Disord 2023;23:74.
8. Nagtegaal ID, Odze RD, Klimstra D, Paradis V, Rugge M, Schirmacher P, et al. The 2019 WHO classification of tumours of the digestive system. Histopathology 2020;76:182–8.
9. Yao JC, Hassan M, Phan A, Dagohoy C, Leary C, Mares JE, et al. One hundred years after "carcinoid": Epidemiology of and prognostic factors for neuroendocrine tumors in 35,825 cases in the United States. J Clin Oncol 2008;26:3063–72.
10. Sakin A, Tambas M, Secmeler S, Can O, Arici S, Yasar N, et al. Factors affecting survival in neuroendocrine tumors: A 15-year single center experience. Asian Pac J Cancer Prev 2018;19:3597–603.
11. Cives M, Strosberg JR. Gastroenteropancreatic neuroendocrine tumors. CA Cancer J Clin 2018;68:471–87.
12. Chinese pathologic consensus for standard diagnosis of gastrointestinal and pancreatic neuroendocrine neoplasm. Zhonghua Bing Li Xue Za Zhi [Article in Chinese] 2011;40:257–62.
13. Sigel C, Reidy-Lagunes D, Lin O, Basturk O, Aggarwal G, Klimstra DS, et al. Cytological features contributing to the misclassification of pancreatic neuroendocrine tumors. J Am Soc Cytopathol 2016;5:266–76.
14. La Salvia A, Modica R, Rossi RE, Spada F, Rinzivillo M, Panzuto F, et al. Targeting neuroendocrine tumors with octreotide and lanreotide: Key points for clinical practice from NET specialists. Cancer Treat Rev 2023;117:102560.
15. Das S, Al-Toubah T, El-Haddad G, Strosberg J. 177Lu-DOTATATE for the treatment of gastroenteropancreatic neuroendocrine tumors. Expert Rev Gastroenterol Hepatol 2019;13:1023–31.