Animal Behavior College (ABC) Externship Practice Test

TDx is the tentative diagnosis—a provisional working diagnosis formed from the initial history, physical exam, and available data. It serves as the guiding hypothesis for starting initial treatment and for planning further tests to confirm or refute it. It isn’t the final, confirmed diagnosis, and it isn’t simply a differential diagnosis list (that list contains multiple possibilities). TDx is directly tied to patient evaluation because it directs management choices and the next steps in testing. Therefore, the true statement is that TDx is the tentative diagnosis not yet confirmed.