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NEW antibody: Mouse antibody anti Chromogranin A, clone LK2H11

Immunohistochemical methods have localized chromogranin in a wide variety of endocrine tissues such as the pituitary, pancreas, hypothalamus, and parathyroid. Neuroendocrine cells exhibit a fine granular immunoreactivity to anti-chromogranin.

 It is generally accepted that the co-expression of certain keratins and chromogranin mean neuroendocrine lineage. The presence of strong anti-chromogranin staining and absence of anti-keratin staining should raise the possibility of paraganglioma. The co-expression of chromogranin and NSE is typical of neuroendocrine neoplasms. Most pituitary adenomas and prolactinomas readily express chromogranin.

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