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Small Bowel Leiomyoma Mimics Neuroendocrine Tumor on 68Ga-DOTATATE PET/CT.
Clin Nucl Med
January 2025
Department of Nuclear Medicine, Royal Free London NHS Foundation Trust, London, United Kingdom.
A 57-year-old man with a 3-month history of lower abdominal pain and rectal bleeding with black stools underwent urgent abdominal CT, which revealed an ovoid hyperdense lesion in the ileum in the right iliac fossa. The prime differential was a midgut neuroendocrine tumor. Thus, the patient was referred for a 68Ga-DOTATATE PET/CT scan, which demonstrated intense activity in this lesion with no evidence of somatostatin receptor expression elsewhere.
View Article and Find Full Text PDFThe exceptionally rare phenomenon of well-differentiated colon neuroendocrine tumors.
J Neuroendocrinol
January 2025
Department of Gastrointestinal Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA.
Colonic neuroendocrine tumors (NETs), excluding rectal NETs, are often described as relatively common and aggressive, with inferior median survival compared with other gastrointestinal (GI) primary sites. However, epidemiological databases may conflate well-differentiated NETs with poorly differentiated neuroendocrine carcinomas (NECs), leading to a lack of precise data on the prevalence, clinical behavior, and prognosis of well-differentiated colonic NETs. We analyzed a large institutional database to identify patients with well-differentiated NETs originating in the colon, excluding rectal NETs.
View Article and Find Full Text PDF[Clinicopathological features and prognosis of rectal neuroendocrine tumor with grade 2].
Zhonghua Zhong Liu Za Zhi
January 2025
Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing100021, China State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing100021, China.
To explore the clinicopathological features of rectal neuroendocrine tumor (R-NET) G2, identify prognostic factors, and summarize treatment experience. The clinical data of patients diagnosed with R-NET G2 by pathological diagnosis admitted to Cancer Hospital of the Chinese Academy of Medical Sciences from January 2003 to September 2023 were retrospectively analyzed. The Fisher's exact test and Kaplan-Meier curves were performed to analyze the association between pathological features and prognosis.
View Article and Find Full Text PDFIntroduction: The prognostic differences between neuroendocrine carcinoma (NEC) and mixed neuroendocrine-non-neuroendocrine neoplasm (MiNEN) remain unclear.
Methods: This study aims to compare the prognostic outcomes of NEC and MiNEN by analyzing the clinicopathological features of these diseases and exploring factors affecting progression after radical surgery. Additionally, we employed whole-exome sequencing to investigate the molecular mechanisms influencing the prognosis of both conditions.
Risk of lymph node metastases and conditional survival in appendiceal neuroendocrine neoplasms.
Surgery
January 2025
Division of Colon & Rectal Surgery, Department of Surgery, University of Minnesota, Minneapolis, MN. Electronic address:
Article Synopsis
- National guidelines recommend segmental colectomy for appendiceal neuroendocrine neoplasms larger than 2.0 cm due to risks of lymph node involvement, with conditional overall survival becoming an important prognostic tool.
- A study of 3,541 patients revealed that 16% had positive lymph nodes, and factors like size, depth of invasion, and lymphovascular involvement were correlated with metastasis.
- The findings suggest that more clinicopathologic factors should influence decisions on surgical treatment and surveillance for better survival rates, especially for patients with more aggressive histologies.
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