Figure 1.

Schematic figure of type 1 diabetes in relation to the rapidness of progression and residual β‐cell mass at onset. β‐Cells are destroyed very rapidly and are almost absent at onset in conventional fulminant type 1 diabetes, but are destroyed and remain relatively slowly in acute‐onset type 1 diabetes. The immune checkpoint inhibitors (ICI)‐related fulminant type 1 diabetes is placed between the two established subtypes from both aspects. HbA1c, glycated hemoglobin.