protooncogenes and tumor suppressor genes in a step-wise fashion D.Overe xpression of growt factor receptor genes are associated with poor prognsis E.Protooncogenes can be activated by chromosomal translocation 51.An epidemiologic study of cancer deaths recorded in the last half of the 20th century is conducted.The number of deaths for one particular type of cancer has bee ng in develo nations Which of the following neoplasm was most likely to be identified by this study?() A.Angiosarcoma of the liver B.Carcinoma of the lung C.Colorectal carcinoma D.Gastric adenocarcinoma E.Leukemia 52.Which procedure yields the HIGHEST incidence of vessel patency after 10 years?( A.Aspirin plus Plavix,p.o. aooeeery inal stent in left anterior descending coronary artery D.Left internal thoracic(mammary)artery to left anterior descending coronary artery E.Reverse saphenous vein to left anterior descending coronary artery 53.A62-year-old man sees his physician because he has had fever and back pain for the past 2 days.Physical examination shows tenderness of the right costovertebral angle.Laboratory studies show leukocytosis and pyuria with WBC casts.He has been receiving antibiotic therapy with cefotaxime,clindamycin,and afllin for the past 16 days. s lower abdominal pain and a sev re diarrhea. ium difficile toxin is id Whichofth following conditions is he MOST LIKELY to have now developed? A.Appendicitis B.Collagenous colitis C.Diverticulitis D.Ischemic colitis 54.A 59-year-old man has had nausea and vomiting for several months.He has experienced no hematemesis.On physical examination,there is no abdominal tenderness,and bowel sounds sent.Upp gastrointestinal endoscopy shows erythematous areas of mucosa with thiekening of the rugal folds in th gastric antrum.The microscopic appearance of a gastric biopsy specimen with a Steiner silver stain is shown above.Which of the following is the BEST DIAGNOSIS?() protooncogenes and tumor suppressor genes in a step-wise fashion D. Overexpression of growth factor receptor genes are associated with poor prognosis. E. Protooncogenes can be activated by chromosomal translocation 51. An epidemiologic study of cancer deaths recorded in the last half of the 20th century is conducted. The number of deaths for one particular type of cancer has been increasing in developed nations. Which of the following neoplasms was most likely to be identified by this study? ( ) A. Angiosarcoma of the liver B. Carcinoma of the lung C. Colorectal carcinoma D. Gastric adenocarcinoma E. Leukemia 52. Which procedure yields the HIGHEST incidence of vessel patency after 10 years? ( ) A. Aspirin plus Plavix, p.o. B. Balloon angioplasty, left anterior descending coronary artery C. Bare endoluminal stent in left anterior descending coronary artery D. Left internal thoracic (mammary) artery to left anterior descending coronary artery E. Reverse saphenous vein to left anterior descending coronary artery 53. A 62-year-old man sees his physician because he has had fever and back pain for the past 2 days. Physical examination shows tenderness of the right costovertebral angle. Laboratory studies show leukocytosis and pyuria with WBC casts. He has been receiving antibiotic therapy with cefotaxime, clindamycin, and nafcillin for the past 16 days. He now develops lower abdominal pain and a severe diarrhea. Clostridium difficile toxin is identified in a stool specimen. Which of the following conditions is he MOST LIKELY to have now developed? ( ) A. Appendicitis B. Collagenous colitis C. Diverticulitis D. Ischemic colitis E. Pseudomembranous colitis 54. A 59-year-old man has had nausea and vomiting for several months. He has experienced no hematemesis. On physical examination, there is no abdominal tenderness, and bowel sounds are present. Upper gastrointestinal endoscopy shows erythematous areas of mucosa with thickening of the rugal folds in the gastric antrum. The microscopic appearance of a gastric biopsy specimen with a Steiner silver stain is shown above. Which of the following is the BEST DIAGNOSIS? ( )