Bobby, age 6, has constant periumbilical pain shifting to the right lower quadrant, vomiting, a small volume of diarrhea, absence of headache, a mild elevation of the white blood cell count with an early left shift, and white blood cells in the urine. You suspect: 1.Appendicitis. 2.Gastroenteritis. 3.Acute pancreatitis. 4.Rocky Mountain spotted fever. {Ans: 1. Appendicitis.}The screening guidelines for colon cancer recommend which of the following for the general population? 1.Colonoscopy starting at age 50. 2.Colonoscopy starting at age 45. 3.Fecal occult blood test (FOBT) and rectal exam starting at age 50. 4.Fecal occult blood test (FOBT) and rectal exam starting at age 45. {Ans: 1. Colonoscopy starting at age 50.}Marcia, age 4, is brought in to the office by her mother. She has a sore throat, difficulty swallowing, copious oral secretions, respiratory difficulty, stridor, and a temperature of 102°F but no pharyngeal erythema or cough. What do you suspect? 1. Epiglottitis. 2. Group A beta-hemolytic streptococcal pharyngitis. 3. Tonsillitis. 4. Diphtheria. {Ans: 1. Epiglottitis.}Timothy, age 68, complains of an abrupt change in his defecation pattern. You evaluate him for: 1.Constipation. 2.Colorectal cancer. 3.Irritable bowel syndrome. 4.Acute appendicitis. {Ans: 2. Colorectal cancer.}Mr. Clark, age 78, is