<prompt> A 35-year-old woman presents with 6-month history of skin rash and fatigue. Physical examination shows pallor and a necrotizing erythematous skin rash of her lower body. Laboratory studies reveal mild anemia and fasting blood glucose of 160 mgdL. A CT scan of the abdomen demonstrates a 2-cm mass in the pancreas. Which of the following is the most likely diagnosis?Carcinoid tumorGastrinomaGlucagonomaInsulinoma  <response>: Necrotizing migratory erythema develops in association with the hypersecretion of glucagon by alpha cell-containing tumors glucagonomas. These patients also have mild hyperglycemia and anemia. The other choices do not present with these clinical signs and symptoms.Diagnosis: Glucagonoma 