A 70-year-old man with a history of hypertension and type 2 diabetes presents with left lower quadrant pain, fever, and urinary urgency. On examination, you notice lower abdominal tenderness and suprapubic discomfort. What could be the diagnosis and what would be the next steps?
The patient's presentation suggests a possible colovesical fistula due to diverticulitis, causing urinary symptoms. This can be investigated further with a CT scan of the abdomen and pelvis. Cystoscopy and colonoscopy could also be considered for confirmation. The treatment typically involves surgery to repair the fistula and remove the affected segment of the colon.