GCK and type 2 diabetes mellitus: Complications. S. Pruhova et al. in their paper titled “Chronic mild hyperglycemia in GCK-MODY patients does not increase carotid Intima-Media Thickness” have examined carotid intima media thickness (CIMT) in patients with glucokinase-mutation maturity onset diabetes of the young (GCK-MODY or MODY2).