<unk>  typically presents with lower quadrant abdominal pain of a sudden onset. Patients commonly have elevated C-reactive protein and a high white blood cell count. In North America and Europe the abdominal pain is usually on the left lower side (sigmoid colon), while in Asia it is usually on the right (ascending colon). There may also be fever, nausea, diarrhea or constipation, and blood in the stool. Complications Gross pathology of a longitudinally opened colon (inside/mucosa at top and outside/serosa at bottom), showing<unk>  with two diverticular abscesses (white arrows). The dark coloration at right is previous colon tattooing for localization. In complicated<unk> , an inflamed diverticulum can rupture, allowing bacteria to subsequently infect externally from the colon. If the infection spreads to the lining of the abdominal cavity (the peritoneum), peritonitis results. Sometimes, inflamed diverticula can cause narrowing of the bowel, leading to an obstruction. In some cases, the affected part of the colon adheres to the bladder or other organs in the pelvic cavity, causing a fistula, or creating an abnormal connection between an organ and adjacent structure or another organ (in the case of<unk> , the colon, and an adjacent organ). Related pathologies may include: * Bowel obstruction * Peritonitis * Abscess * Fistula * Bleeding * Strictures
Diverticulitis
Irritable bowel syndrome
Ischemic colitis
Segmental colitis associated with diverticulosis
Appendicitis
Diversion colitis
Proctocolitis
Gastroenterocolitis