Testosterone Levels for Evaluation of Androgen Deficiency

摘要: A 54-year-old man with hypertension and diabetes presented to the endocrinology clinic a 5-month history of fatigue, weight gain, interrupted sleep, daytime somnolence. He has normal libido but experiences occasional erectile dysfunction, which is being successfully managed phosphodiesterase-5 inhibitor. His other medications include metformin amlodipine. married, 3 children, reports sedentary lifestyle. recently heard on radio that his symptoms might be due “low T.” One month ago, he saw primary care physician requested measurement testosterone level. morning total level (measured by mass spectrometry) was 279 ng/dL (normal reference range for this laboratory, 300-900 ng/dL), prompting referral. On physical examination, body index 34.7 (calculated as in kilograms divided height meters squared).He not cushingoid visual fields were normal. Acanthosis nigricans noticed neck. There no gynecomastia. testes size. muscle strength Relevant laboratory tests, including repeat assessed an clinic, are reported Table.