A patient complains of fever, flatulence, left lower quadrant stomach discomfort that worsens with coughing and straining, and feverish symptoms.
Also mentioned are changes in bowel habits.
Upon physical examination, a palpable, sensitive rectal tumor is discovered.
Intestinal mucosal inflammation and outpouchings are seen on a CT scan of the sigmoid colon.
The most likely diagnosis for the patient is:
