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Asymptomatic Ileal Neuroendocrine "Carcinoid" Tumor Incidentally Diagnosed on Colorectal Cancer Screening
Ali Zakaria1, Lynna Alnimer2, Gregory Byrd3
1Division of Gastroenterology, Ascension Providence Hospital, Michigan State University/College of Human Medicine, Southfield, Michigan, USA.
Case Reports in Gastrointestinal Medicine
|February 24, 2021
Summary
Gastrointestinal neuroendocrine tumors (GINETs) are rare but increasingly detected. This case series emphasizes terminal ileal intubation during colonoscopy for early detection of small bowel GINETs.
Area of Science:
- Gastroenterology
- Oncology
- Endoscopy
Background:
- Gastrointestinal neuroendocrine tumors (GINETs), also known as carcinoids, are rare neoplasms.
- Incidence is rising due to improved detection via imaging and endoscopy.
- Small bowel NETs are most common in the terminal ileum.
Observation:
- Patients with small bowel NETs may be asymptomatic, diagnosed incidentally during colonoscopy.
- Terminal ileal (TI) intubation is not always performed during routine colonoscopies.
- Nine cases of incidentally found NETs in asymptomatic patients during colon cancer screening are presented.
Findings:
- TI intubation is successful in at least 70% of colonoscopies.
- The detection rate of neuroendocrine tumors during TI intubation is 0.1-1%.
- This case series highlights the value of TI intubation in detecting small bowel NETs.
Implications:
- The findings raise the question of whether TI intubation should be part of the definition of a complete colonoscopy.
- Early detection of small bowel NETs through TI intubation can potentially improve patient outcomes.
- Further research is needed to establish standardized guidelines for TI intubation in colonoscopy.
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