As a speech language pathologist you want to be sure that you communicate the correct diagnosis to your clients: does your client stutter, clutter, or does he/her have characteristics of both disorders? Susanne Cook, specialist in the field of fluency disorders and professionally involved in the International Cluttering Association, explains how she diagnoses and treats people who clutter. What are important elements in treatment? How does she approach the treatment? And what can speech-language pathologists do to feel more confident in generating a differential diagnosis?