is sometimes missed by the pathologist, and we sought to determine how often this occurs at our institution-a large tertiary care center with a subspecialty gastrointestinal pathology service and what certain clinical and histologic clues can be used to flag cases with a higher likelihood of infection, targeting them for greater scrutiny. We identified a set of patients who tested positive for Biopsies with a histologic abnormality or those from immunocompromised patients should receive greater attention. Routinely looking for