A 34-year-old man comes to the physician for a follow-up appointment. He has a 6-month history of bloating with meals. Hemoglobin is 11 g/dL. His MCV is 72 fL.
Which of the following is most likely to be seen in this patient?
A) Decreased serum C4 with immune complex deposition at cooler temperatures
B) IgA deposition at dermal papillae
C) IgA immune complex deposition in small superficial vessels
D) Macrophages within the lamina propria
E) Munro microabscesses
