Usefulness of Testing for Fecal Calprotectin in Pediatric Gastroenterology Clinical Practice.

Gastrointestinal tract symptoms such as abdominal pain, constipation, diarrhea, and fever are common reasons for which parents take children to the pediatrician. An increasing prevalence of chronic diseases of the gastrointestinal tract and a decrease in the median age of their onset indicate the need to search for new diagnostic methods for differentiating inflammatory bowel diseases (IBDs) from other gastrointestinal tract diseases. An example of a novel biomarker is fecal calprotectin (FC), which is considered a noninvasive and useful marker of intestinal inflammation. This review summarizes currently available information on the use of FC in the diagnosis and monitoring of IBD in children. Additionally, it attempts to determine the course of action depending on the concentration of FC. Application of FC determination within the framework of primary medical care can decrease the number of children unnecessarily referred either to endoscopic or radiologic examination. There is a double advantage of calprotectin screening; for patients, it reduces delays in diagnosis and unnecessary exposure to endoscopy, and for doctors, it reduces pressure on endoscopy testing and facilitates decision-making. We emphasize the role of FC as a noninvasive marker, primarily in patients with IBD, in monitoring disease activity, predicting relapse, monitoring therapy efficacy, and monitoring postoperative relapses.