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Biologically inactive ACTH-producing pituitary adenoma is known as clinically silent corticotroph adenoma. To search for the mechanism causing clinically silent corticotroph adenoma, we immunohistochemically examined the expression of prohormone convertase 1/3 (PC1/3) in this type of adenoma and compared our results with those obtained for Cushing's disease. All of the Cushing's disease specimens...
BackgroundA silent corticotroph-cell adenoma (SCCA) is defined as evidence of immunoreactive ACTH in tumor cells of a pituitary adenoma that is not associated with symptoms of Cushing's disease. Most previous reports have discussed the etiology of this unique entity; however, the precise mechanisms of its s ilence are not clear yet. We discuss the pitfalls of endocrinological diagnosis...
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