Gastric Carcinoid: The Invisible Tumor!

Area of Science:

• Gastroenterology
• Oncology
• Pathology

Background:

• Neuroendocrine tumors (NET) of the stomach, known as gastric carcinoids (GC), originate from enterochromaffin-like (ECL) cells.
• GC are rare, predominantly affecting women over 50, with a recent upward trend in incidence.
• While often visible during endoscopy, a significant portion (25%) are intramucosal and difficult to detect.

Observation:

• Most gastric carcinoid tumors are visible lesions during endoscopic examination.
• A notable proportion of gastric carcinoids are intramucosal, posing diagnostic challenges via standard upper endoscopy.
• Complete gastric mapping with biopsies from antrum, body, and fundus is crucial for accurate diagnosis.

Findings:

• This report details a rare case of gastric carcinoid identified incidentally on a random gastric biopsy specimen.
• The findings underscore the importance of comprehensive histological evaluation, even from seemingly random biopsies.
• The case illustrates a diagnostic scenario where the tumor was not readily apparent on initial endoscopic visualization.

Implications:

• Highlights the necessity of systematic biopsy protocols in gastric evaluations to avoid missing subtle lesions.
• Emphasizes the role of histopathology in diagnosing challenging cases of gastric carcinoid.
• Suggests potential underdiagnosis of intramucosal gastric carcinoids due to limitations in endoscopic visualization.