A 15-year experience with gastric neuroendocrine tumors: Does type make a difference?

Area of Science:

• Gastroenterology
• Surgical Oncology
• Endocrinology

Background:

• Gastric neuroendocrine tumors (GNETs) are rare and classified into three distinct types based on etiology and behavior.
• Understanding the differences between GNET types is crucial for effective patient management.

Purpose of the Study:

• To analyze and compare outcomes following GNET resection stratified by tumor type.
• To provide insights into the clinical behavior and prognostic factors of different GNET subtypes.

Main Methods:

• Retrospective analysis of 22 patients who underwent GNET resection between 2000 and 2014.
• Outcomes were stratified by tumor type (Type 1, Type 2, Type 3).
• Due to small patient numbers, P-values were not assigned.

Main Results:

• Type 1 GNETs (55%) were more common than Type 3 (45%), with Type 2 absent.
• Type 1 GNETs were associated with younger patients, multifocality, less nodal involvement, and lower rates of metastatic disease at presentation.
• Despite a lower initial metastatic rate, Type 1 GNETs showed a higher 3-year recurrence rate (33%) compared to Type 3 (86%).

Conclusions:

• Type 1 GNETs are generally indolent and multifocal, with a high risk of recurrence but good disease-specific survival.
• Type 3 GNETs are more aggressive, characterized by increased nodal involvement, necessitating routine nodal evaluation.
• Accurate determination of GNET type is critical for guiding treatment strategies and predicting patient outcomes.