A 54 year old caucasian male who was diagnosed with type II diabetes mellitus 2 years ago presents with persistently poor glycemic control. His HbA1c was 8.5% while on maximum doses of Metformin and Glipizide, with good dietary and drug compliance. A recent renal profile, serum electrolyte assay and full blood count were completely normal.
Serum iron: 306 ug/dl (< 155) Total Iron Binding Capacity: 315 ug/dl (< 400) Transferrin saturation: 97% (< 50%) Serum Ferritin: 2,920 ug/l (< 160)
Morning cortisol: 20 ug/dl (5 - 25) Urinary free cortisol: 70 ug/24 hr (10 - 110)
The blood picture appears completely normal.
Hepatitis C DNA: negative