<unk>  is more common in patients older than 40 years of age; however, it can occur at any age. "The reported ages range from 12 to 82 years. Men are slightly more affected than woman." Patients with<unk>  appendicitis describe having a localized, strong, non-migratory sharp pain after eating. Patients generally have tender abdomens as a symptom. Symptoms do not include fever, vomiting, or leukocytosis. The pain is typically located in the right or left lower abdominal quadrant. When there is pain in the right lower quadrant, it can mimic appendicitis; however, it more commonly mimics diverticulitis, with pain present on the left side. Differential diagnosis There are several conditions that mimic the symptoms of<unk>  appendicitis. Omental infarction: Omental infarction is uncommon reason for acute abdomen. It is similar to acute appendicitis. The pain is of a few days duration centering in the right lower or upper quadrant. Imaging is required to obtain an accurate diagnosis due to the common misdiagnosis of omental infarction as appendicitis or cholecystitis. Omental infarction occurs commonly in pediatric patients approximately 15 percent of cases. The most frequent cause of non- torsion related omental infarction is due to trauma as well as thrombosis or the omental veins. The predisposition for omental infarction includes obesity, strenuous activity, congestive heart failure, digitalis administration, recent abdominal surgery and trauma. "The typical CT findings are a solitary large non-enhancing omental mass with heterogeneous attenuation, which is most often located in the right lower quadrant, deep to the rectus abdominis muscle and either anterior to the transverse colon or anteromedial to the ascending colon". Omental Infarction can be difficult to differentiate from diverticulitis however omental infarction is not normally attributed with bowel wall thickening. It is rare that the colonic wall will be thickened due to spread of the inflammation from the omentum (a fold of peritoneum connecting or supporting abdominal structures) to the tenia omentalis of the colon. Diverticulitis: Diverticulitis normally happens in older patients than in<unk> . The two inflammatory conditions are quite indistinguishable based on physical manifestations. Patients with diverticulitis will present with nausea, vomiting, fever, elevated leukocyte count rebound tenderness, and will have more extensive lower abdominal pain than patients with<unk> . Additionally inflammation from diverticulitis may spread to the<unk>  appendages making it difficult to diagnose, for inflammation of the appendices<unk> ae may be resultant to other inflammatory conditions in the colonic wall and surrounding mesocolon. Radiologic evaluation Ultrasound and CT scans are the normal means of positive diagnosis of<unk> . Ultrasound scans show "an oval, non-compressible hyperechoic mass with a subtle hypoechoic rim directly under the site of maximum tenderness". Normally,<unk>  appendages cannot be seen on CT scan. After cross-sectional imaging and the increased use of abdominal CT for evaluating lower abdominal pain, EA is increasingly diagnosed. Pathognomonic CT scan data represent EA as 2–4 cm, oval shaped, fat density lesions, surrounded by inflammation. Contrasting with diverticulitis findings, the colonic wall is mostly unchanged.
Epiploic appendagitis
Sigmoid colon volvulus
Devon colic
Ischemic colitis
Vesicointestinal fistula
Distal intestinal obstruction syndrome
Diverticulitis
Diversion colitis