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A 45-year-old man has decreased libido and erectile dysfunction. He has noted increasing pigmentation. He has developed liver disease and arthropathy recently. Which of the following is the best diagnostic test?
A. Serum TSH
B. Serum calcium
C. Serum prolactin
D. Serum ferritin
E. Serum gastrin

Serum ferritin. Semms like an hipofysis, liver disease due to hemocromatosis

I agree with D.

yes its D.

hemochromatosis.

The right anwser is D).

Explanations:
The patient has classic manifestations of hemochromatosis that impairs hypothalamic pituitary function. Serum ferritin is potentially diagnostic in this patient. All the other tests are not diagnostic for hemochromatosis