Abstract:
OBJECTIVES:Many patients with small bowel neuroendocrine tumors (SBNETs) have multifocal tumors (MFTs), but the frequency of MFTs has varied widely across SBNET studies. It is also unclear whether patients with MFTs have more advanced disease or worse clinical course than do those with unifocal SBNETs. We set out to determine the frequency of multifocal and unifocal SBNETs and compare clinicopathologic factors, somatostatin receptor 2 expression, and survival. METHODS:Clinicopathologic variables from 179 patients with surgically managed SBNETs were collected. Statistical comparisons were made using Welch t-test, Wilcoxon test, and Fisher's exact test. Survival was assessed using the Kaplan-Meier method. Somatostatin receptor 2 expression was analyzed by quantitative polymerase chain reaction, and Ki-67 expression by immunohistochemistry. RESULTS:Multifocal tumors were found in 45% of patients with SBNETs. Clinicopathologic factors such as grade, TNM stage, presence of distant metastases, mean somatostatin receptor 2 expression, success of imaging modalities, and preoperative and postoperative hormone levels were not significantly different between multifocal and unifocal groups. Progression-free survival and overall survival were also not significantly affected by multifocality. CONCLUSIONS:Clinicopathologic features and survival of patients with MFTs and unifocal tumors are remarkably similar. Although the etiology of MFTs is unclear, patients with MFTs do not have a more aggressive clinical course than patients with unifocal SBNETs.
journal_name
Pancreasjournal_title
Pancreasauthors
Choi AB,Maxwell JE,Keck KJ,Bellizzi AJ,Dillon JS,OʼDorisio TM,Howe JRdoi
10.1097/MPA.0000000000000911subject
Has Abstractpub_date
2017-10-01 00:00:00pages
1115-1120issue
9eissn
0885-3177issn
1536-4828pii
00006676-201710000-00005journal_volume
46pub_type
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