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Case of the Week 355

What's the most likely diagnosis?

  • 50 year-old male with abdominal pain, diarrhea

Contrast-enhanced coronal CT image of the abdomen

  1. Hernia
  2. Pheochromocytoma
  3. Appendicitis
  4. Large bowel obstruction
  5. Carcinoid tumor

Additional Image - Contrast enhanced CT image of the abdomen


Additional Image



Contrast enhanced axial CT image of the abdomen




5. Carcinoid Tumor of the Small Bowel



More (Click Discussion Tab)

Carcinoid Tumor of the Small Bowel

Submitted by Theresa Kaufman, MSIV

General Considerations

  • Rare, potentially malignant, neuroendocrine tumor of primitive stem cells in gut wall which have hormone-secreting potential
    • Arise from enterochromaffin cells of Kulchitsky
  • Male predominance
  • ~50% of carcinoids occur in appendix; ~33% occur in small bowel
  • Most common primary tumor of the small bowel
  • Most appendiceal carcinoids are benign

    More ...


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