This patient had a 4-year history of diabetes. What is the diagnosis?
Bullous disease of diabetes
Necrobiosis lipoidica diabeticorum
Necrolytic migratory erythema
Pigmented purpuric dermatosis
Answer C. Necrolytic migratory erythemaGlucagonomas are rare neuroendocrine tumors that can cause diabetes and a rash known as necrolytic migratory erythema, which has a characteristic annular pattern of erythema with central crusting and bullae. The rash resolved after excision of a 7-cm glucagonoma from the tail of the pancreas.
Skin