The purpose of the study (clinical indication), the histopathologic results (if available), any history of previous relevant studies, previous interventions/therapies (biopsy, surgery, chemotherapy, and radiotherapy), history of recent infections or inflammation, medications (e.g., corticosteroid, granulocyte colony-stimulating factor [G-CSF]), recent administration of enteral barium (per oral or per rectum), whether sedation or analgesia is required, and whether a diagnostic CT (with or without contrast) is needed should all be clarified before protocoling the study. The gene discussed is CSF3; the disease is infection.