For the following causes of sexual dysfunction, select the most likely clinical feature.Can be caused by high prolactin level.
Correct Answer: failure of erection with absent nocturnal penile tumescence (NPT)
Description: High prolactin level suppresses luteinizing hormone-releasing hormone (LH-RH), and can result in low plasma gonadotropin and testosterone levels. It may not be obvious on physical examination. Therapy with a dopamine agonist may lower prolactin levels and reverse impotence.
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