A 40yearold man is referred to the genetics clinic by his internist. He has chronic fatigue, joint pain in his hands and neck, and type 2 diabetes. Complete blood count, thyroid function studies, and lipid profiles are within the normal
ranges, but serum ferritin levels are increased. Which of the following is the MOST likely diagnosis?

A. acute intermittent porphyria B. Fabry disease
C. hemochromatosis
D. Wilson disease