In a JAMA Diagnostic Test Interpretation article, Tritos and Klibanski present a 47-year-old man with recent-onset fatigue, vision loss, and low libido. The patient denied headache, erectile dysfunction, or breast tenderness. Physical examination was significant for bitemporal visual field defects; the patient did not have acromegalic features, gynecomastia, or galactorrhea. Laboratory evaluation revealed low testosterone and thyrotropin levels and elevated serum prolactin. How would you interpret the test results?