1. A 64 y/o male presents with chronic weight loss that is significant and unwanted. Chest X-ray and CT scans show infiltrates and a possible mass. The patient has no known history of immune suppression or steroid use. An EGD was performed due to difficulty swallowing and showed a 5cm stricture. This area was biopsied, and representative images are shown. Based on the findings, what is the best diagnosis?

2. A 60 y/o man undergoes colonoscopy, and is noted to have a “nodular” mucosal surface. Multiple biopsies are performed, and representative images and stains are shown. Based on the findings, what is the best diagnosis?

3. All of the following are true about collagenous colitis, EXCEPT:

4. A 60 y/o male presents with a history of chronic diarrhea. Colonoscopy was performed with no significant findings. Random biopsies were obtained, which are shown for this case. Based on these findings, what is the best diagnosis?

5. Which of the following are true about gastric foveolar polyps?

6. A 36 y/o Mongolian woman presents with disseminated nodule on the peritoneum during an exploratory laporatomy. She has a past history of “stomach cancer” 10 years earlier. Representative images of the histology, including special stains, are shown. What is the best diagnosis?

7. All of the following are characteristic of lymphocytic colitis, EXCEPT:

8. Fundic gland polyps are associated with all of the following EXCEPT:

9. In the images for the case below, which of the following FISH studies would most likely be positive?

10. A 40 y/o female undergoes an EGD. Multiple nodules are noted in the stomach. Based on the images shown, what is the best diagnosis?