Case 1: "A 23-year-old male presents with progressive abdominal pain for 1 month"
Case 2: "A 30-year-old female presents with paraplegia for 2 days"
Case 3: "A 16-year-old male presents with a submental mass for 3 days"
Case 4: "A 47-year-old male presents with chronic abdominal pain for 4 months"
Case 5: "A 68-year-old male presents with left chest wall mass for 2 months"