Edward is a 57 year old Caucasian architect with a 3 month history of lethargy and more recently erectile dysfunction. He is in a happy relationship and denies any stress. He is a non-smoker and drinks no alcohol. You comment that he looks very tanned, and he agrees saying that his family have observed this also despite no travel abroad.
Based on the likely diagnosis, what abnormality would you expect to see on his blood results?