Abnormal OGTT Results - The many causes
direct image link As often happens, when looking for something a bit more specific, I came across this image at right, which led me to this webpage: Laboratory Testing for Diabetes Mellitus. Curve 1 is a normal OGTT, Curve 6 is a diabetic. The other causes are listed: Pathologic conditions causing impaired, or diabetic, glucose tolerance results: Hypercorticism - curve 5. Acromegaly - between curves 4 and 5 Hyperthyroidism - curve 4. Pheochromacytoma (or "emotional hyperglycemia") - between curves 4 and 5