[Diabetes or hyperglycemia?].

An 11-year-old boy developed influenza with glucosuria. An oral glucose test performed during the infection revealed values within the diabetic range. Type 1 diabetes was wrongly diagnosed and insulin therapy initiated. A 19-year-old overweight adolescent developed pneumonia with hyperglycemia but without polydipsia or polyuria. Further investigation revealed incipient type 1 diabetes. As insulin therapy was not initiated the diabetes rapidly decompensated. It is recommended that further investigations be conducted in patients with hyperglycemia following infections.