“Diagnosis /di·ag·no·sis/ (di″ag-no´sis) the determination of the nature of a case of a disease or the distinguishing of one disease from another.”
-- Dorland's Medical Dictionary for Health Consumers. © 2007 by Saunders, an imprint of Elsevier, Inc.
Diagnoses are useful as they serve to describe a group of symptoms or behaviors. Yet, every individual is unique and won't fit perfectly in a box, nor should we attempt to make them fit. As it says in the Talmud (Sanhedrin 37a), "The world was created (just) for me.”
Individuals grow and change, including children who have been given a specific diagnosis. A diagnosis doesn't define the ultimate potential of any given child and sometimes it might be too early to make a diagnosis.