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A 54-year-old man presented with a history of several weeks of fatigue and weight loss. He also reported atrophy of the testes and loss of secondary hair that had begun one and a half years earlier. The results of neurologic and ophthalmologic examinations were normal. Evaluation of serum hormone levels revealed a slightly increased prolactin level (20.9 ng per milliliter) and decreased levels of follicle-stimulating hormone (0.2 IU per milliliter), luteinizing hormone (<0.7 IU per milliter), and testosterone (<0.1 ng per milliliter [0.347 nmol per liter]). The levels of growth hormone, thyrotropin, and corticotropin were within normal limits. Contrast-enhanced, T1. . . [Full Text of this Article] |
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