Postoperative fistulas and abscesses were diagnosed clinically and paraclinically (using laboratory tests and imaging) by using an algorithm proposed by our clinic that uses an association between C-reactive protein (CRP) ± the leukocyte count measured from the peritoneal fluid (when there is peritoneal drainage) and blood leukocytes, to which, depending on the results and the clinical examination, we also added the control CT examination [13]. This evidence concerns the gene CRP and abscess.