A 70-year-old man presents with abdominal pain, fever, and chills. He also reports increasing fatigue over the last week. On examination, you find a tender mass in the left lower quadrant. What could be the possible diagnosis and how should you proceed?
This patient's symptoms and physical findings suggest the possibility of complicated diverticulitis, potentially an abscess formation. The next step would be a CT scan, which could confirm the diagnosis and reveal the size and location of the abscess. Depending on the size of the abscess, treatment may involve antibiotics and percutaneous drainage or, in severe cases, surgical intervention.