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USMLE · Question #500
USMLE Question #500: Real Exam Question with Answer & Explanation
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Question
A 17-year-old girl is brought to the physician by her mother because she has not had a menstrual period for 6 months. The patient is unconcerned about the lack of menses. Menarche occurred at the age of 12 years, and menses had occurred at regular 28-day intervals until they became irregular 1 year ago. She is a member of her high school gymnastics team. She appears emaciated. She is 163 cm (5 ft 4 in) tall and weighs 40 kg (88 lb); BMI is 15 kg/m. Her pulse is 54/min, and blood pressure is 80/50 mmHg. Which of the following is the most likely cause of this patient's amenorrhea?
Options
- AHyperthyroidism
- BHypogonadotropic hypogonadism
- CHypothyroidism
- DPolycystic ovarian syndrome
- EProlactinoma
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