NAVLE (North American Veterinary Licensing Examination) Practice Exam 03
Practice exam for NAVLE (North American Veterinary Licensing Examination).
Question 1
MEDIUMA 9-year-old spayed female domestic shorthair cat is presented for progressive weight loss despite a ravenous appetite and intermittent vomiting. On exam, the cat is tachycardic with a palpable cervical “slip.” A CBC/chemistry panel is unremarkable except for mild ALT elevation. Total T4 is 2.8 µg/dL (reference 1.0–4.0). What is the most appropriate next diagnostic step to confirm the suspected diagnosis?
This cat has classic clinical signs of hyperthyroidism, but total T4 is in the reference interval, which can occur with early/mild disease or concurrent illness. A T3 suppression test (or free T4 by equilibrium dialysis in many practices) is an appropriate confirmatory test when total T4 is equivocal. Fructosamine assesses glycemic control, ACTH stimulation evaluates adrenal function, and bile acids assess hepatic function. Empiric therapy without confirmation is not the best next diagnostic step for NAVLE-style decision-making.
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