Failure to thrive (FTT) is a common term to describe a lack of adequate weight gain in pediatric-aged patients. Despite its common use as a descriptive diagnosis, the exact definition of the condition remains debated. Therefore, measuring patient outcomes and complications specifically associated with the finding of FTT can be challenging. Various anthropometric criteria for the diagnosis have been proposed. Current consensus defines FTT as a weight for age less than the fifth percentile on…