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Immunohistochemistry of Men1TSM/+ mouse lesions. (a) Insulin immunohistochemical staining of a pancreatic section from a 20-month-old mouse. This section (×10) shows small islets (S), hyperplastic islets (H), and tumor (T), all containing insulin at appreciable levels. (b) Prolactin immunohistochemical staining of a pituitary adenoma section (×120) from a 21-month-old mouse.
