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Immunohistochemical staining for Foxp3. A: Pituitary of the index autopsy case. The inset shows that Foxp3 is not expressed in the index autopsy case. B: Pituitary from a melanoma patient who had received treatment with ipilimumab but had not developed hypophysitis. The inset shows that pituitary acini are negative for Foxp3. Boxed areas are enlarged in the insets. Original magnification: ×40 (A and B, main images); ×160 (A and B, insets).
