This document contains four patient case summaries: 1) A 25-year-old male farmer presented with blood in stool, abdominal pain, and weakness. Examination found pallor and urticarial rash. Stool examination found eggs of Anchyostoma duodenale indicating hookworm infection. 2) A 55-year-old woman presented with unintentional weight loss, weakness, and increased appetite without family history of diabetes or other conditions. Blood tests found prediabetes. 3) A 55-year-old woman was admitted with severe vomiting and altered mental status after irregularly taking higher doses of metformin. Tests found diabetic ketoacidosis. 4) A 68-