1. A 50-year-old female is found to have a 5 cm pancreatic tumor in the tail. A partial pancreatectomy is performed, and representative histologic images are shown for this case. Based on the histologic findings and the clinical history, which of the following is the best diagnosis?

2. Which of the following is the most important prognostic indicator in MALT lymphoma?

3. A patient with a history of HIV and disseminated histoplasmosis undergoes screening colonoscopy for intractable G.I. bleeding. Several red to purple patches are found along the colonic mucosa, and partial resection is performed. Representative histologic sections are shown. Based on the clinical history and histologic findings, what is the best diagnosis?

4. A 45-year-old female is found to have a 2.5 cm cecal mass. And excision was performed, and representative images are shown for this case. Based on the histologic findings, what is the most likely diagnosis?

5. A 35-year-old female who underwent a CT scan for dysplasia was found to have a localized stomach mass. An EGD was performed, and representative histologic images from the biopsy or shown. Based on the histologic findings, what is the most likely diagnosis?

6. A 55-year-old man undergoes an EGD for dysphasia. While examining the duodenum, and nodularity was noted in the duodenal bulb. This area was biopsy, and representative histologic sections are shown. Based on the histologic findings which of the following is the best diagnosis?

7. A patient is found to have a liver mass by CT scan. Representative histology is shown in the images for this case. You are asked to review the case. Which of the following is the single test stain to confirm this diagnosis?

8. A colonic mass is found in a 45-year-old male with a history of anemia. At surgery a hemicolectomy was performed, and representative histologic images are shown for this case. Based on the findings, which of the following is the best diagnosis?

9. A 30-year-old female is found to have a 10 cm pancreatic mass. Representative histologic slides from this lesion are shown. Based on the history and histologic findings, what is the best diagnosis?

10. All of the following are helpful in diagnosing reflux esophagitis (GERD) EXCEPT: