Caecal carcinoma can clinically mimic acute appendicitis, either by presenting as a painful mass or secondary to perforation.
In this case we can see an exuberant inflammatory inflammatory process with free fluid on caecum region. These, with the clinical history, can suggest us for an acute appendicitis, but the history of previous appendicectomy and the markedly thickened and irregular caecal walls show us a caecal tumour.
Colorectal carcinoma is the most common cancer of the gastrointestinal tract and the second most frequently diagnosed malignancy in adults.
See also other causes of small bowel obstruction.