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Gastro Patho EXAM 2005 QUESTIONS

Gastro Patho EXAM 2005 QUESTIONS - Gastrointestinal...

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1 Gastrointestinal Pathophysiology Exam 2005 Tufts University School of Medicine Please select the one BEST answer. 1. A 21 year old man has weight loss and episodic bloody diarrhea. The bloody diarrhea has become more frequent recently. A colonoscopy shows erythema and diffuse small ulcers from the rectum to the mid-transverse colon. Biopsies show architectural distortion and cryptitis. The most likely diagnosis is which of the following? A. Ischemic colitis B. AIDS-associated gastroenteritis C. Clostridium difficile colitis D. Crohn’s disease E. Collagenous colitis (lymphocytic colitis) F. Amebiasis G. Ulcerative colitis H. Cytomegalovirus colitis I. Ulcerative jejunoileitis 2. A 42 year old man abuses intravenous drugs. He complains of 2 weeks of anorexia and nausea. He noted that his urine turned dark and his stool turned light. Blood work is consistent with acute viral hepatitis. Serologic studies are done: Hepatitis A IgG: positive Hepatitis A IgM: negative Hepatitis C Antibody: negative Hepatitis B surface antigen: positive Hepatitis B surface antibody: negative Hepatitis B core IgM antibody: positive Which of the following best explains the mechanism of hepatic injury in this patient? 3. A barium study on a 55 year old man is shown below:
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