The document describes three patients presenting with various symptoms. Patient 1 has jaundice and symptoms of fatigue and loss of appetite, indicating liver disease. Patient 2 has severe abdominal pain localized to the right side, suggesting appendicitis. Patient 3 has abdominal pain, fever, vomiting and diarrhea after eating seafood, likely suffering from food poisoning. The document prompts the reader to identify the conditions, affected body parts, causes, recommended tests, and preventative measures for each patient.