Endocrinology Quiz #10: Adrenal Steroids and Congenital Adrenal Hyperplasias

1. A 2-week-old male infant is brought to the pediatrician because of vomiting and failure to gain weight. Physical examination reveals ambiguous genitalia and hyperpigmentation of the skin. Laboratory tests show hyponatremia, hyperkalemia, and low serum cortisol levels. Which enzyme deficiency is most likely responsible for this patient's condition? 

Question 1 of 5

2. A 17-year-old female patient presents with lack of menstruation and failure to develop secondary sexual characteristics. Her blood pressure is noted to be significantly elevated on multiple readings. Laboratory findings indicate low serum potassium levels and an elevated level of serum aldosterone. Which of the following enzyme deficiencies is most likely in this patient? 

Question 2 of 5

3. A newborn presents with virilization and an enlarged clitoris. The parents are concerned about the ambiguous genitalia. Laboratory tests reveal elevated levels of 17-hydroxyprogesterone. Which of the following is the most likely diagnosis? 

Question 3 of 5

4. A child is diagnosed with congenital adrenal hyperplasia due to 11-beta-hydroxylase deficiency. Which of the following sets of laboratory findings is most likely in this condition?

Question 4 of 5

5. A 5-year-old boy is brought to the physician because of early signs of puberty, including deepening of the voice and pubic hair development. His parents are of average height, but he is significantly taller than his peers. Blood pressure is normal. Laboratory tests reveal elevated levels of androstenedione. Which enzyme deficiency is the child most likely to have? 

Question 5 of 5


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