PathMD Quizes, GI Pathology GI Pathology – 02 October 29, 2017 peferguson Make sure to subscribe to PathMD to stay up to date with new content and features!! 1. A 55 y/o female is found to have an abdominal mass. A surgery a mass was found within the mesentery abutting the stomach and small intestine. Immunohistochemistry found the cells of interest to be positive for smooth muscle actin but negative for CD34, CD117, S-100, and desmin. Based on the histologic immunohistochemical findings, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #9 Gastrointestinal Pathology - Set 2, Case #9 Gastrointestinal Pathology - Set 2, Case #9 Gastrointestinal Pathology - Set 2, Case #9SchwannomaSmooth muscle tumorMesenteric melanoma FibromatosisGastrointestinal Stromal Tumor (GIST) 2. A 45 y/o Asian male with a history of chronic hepatitis B presents to the ER with a liver mass by CT scan. Surgery is performed and representative images of the histology are shown. Based on the findings, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #10 Gastrointestinal Pathology - Set 2, Case #10 Gastrointestinal Pathology - Set 2, Case #10Macroregenerative noduleChronic hepatitis B CholangiocarcinomaCirrhosisHepatocellular carcinoma 3. A 55 y/o male is found to have a mass lesion in the anal canal just above the dentate line. Based on the history and histologic findings in the images, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #1 Gastrointestinal Pathology - Set 2, Case #1 Gastrointestinal Pathology - Set 2, Case #1“Cloacogenic” carcinoma Small Cell CarcinomaMSI associated adenocarcinoma Poorly differentiated adenocarcioma Spindle cell squamous cell carcinoma 4. A 60 y/o female undergoes a screening colonoscopy and is found to have a single left-sided colon polyp. Based on the histologic findings in the images for this case, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #3 Gastrointestinal Pathology - Set 2, Case #3 Gastrointestinal Pathology - Set 2, Case #3Inflammatory fibroid polyp Prolapse polyp Colitis cystica profunda Hyperplastic polyp Tubular adenoma 5. A 55 y/o male with a history of intermittent bloody stool undergoes a colonoscopy. A large polyp is found and biopsied. Based on the histologic finding shown, what is the best diagnosis: Gastrointestinal Pathology - Set 2, Case #7 Gastrointestinal Pathology - Set 2, Case #7 Gastrointestinal Pathology - Set 2, Case #7Tubular Adenoma with high grade dysplasia Tubular Adenoma with MAI infection Tubular Adenoma Tubular Adenoma with Whipple’s diseaseTubular Adenoma with signet ring carcinoma 6. A 45 y/o male with a history of constipation and occasional bright read blood on his stool undergoes a colonoscopy. A polypoid lesion is identified in the left colon, and a biopsy is performed. Based on the histologic findings, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #6 Gastrointestinal Pathology - Set 2, Case #6 Gastrointestinal Pathology - Set 2, Case #6Inflammatory fibroid polyp Prolapse polyp Tubular adenoma Hyperplastic polyp Colitis cystica profunda 7. A 35 y/o black male with a history of renal transplant and unspecified GI complaints undergoes colonoscopy for the evaluation of GVHD. Based on the histologic findings, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #8 Gastrointestinal Pathology - Set 2, Case #8HSV infection Graft versus host disease Ischemic bowel CMV infection Histoplasmosis 8. A 45 y/o woman undergoes colonoscopy for chronic diarrhea. No polyps or ulcerations are found. The mucosal surface is somewhat discolored, and multiple biopsies are obtained. Based on the histologic findings, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #5 Gastrointestinal Pathology - Set 2, Case #5Melanosis Coli Whipple’s disease Vitamin E deficiencyMAI infection Ceroidosis “Brown Bowel Syndrome” 9. A 35 y/o male with HIV presented to the ER with a h/o bloody diarrhea. Colonoscopy with multiple biopsies were performed. Based on the histologic findings in the images, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #2 Gastrointestinal Pathology - Set 2, Case #2HSV infection CMV colitis Ischemic colitis Pseudomembranous colitis E. coli H7:O157 infection 10. A 70 y/o woman undergoes a screening colonoscopy and is found to have a right sided polyp. Based on the histologic findings in the images, the best diagnosis is: Gastrointestinal Pathology - Set 2, Case #4 Gastrointestinal Pathology - Set 2, Case #4HamartomaGastrointestinal Stromal Tumor Liposarcoma, low grade Granular cell tumor Lipoma Loading...