Confirmation: Crooke's hyaline change is altered perinuclear cytokeratin (photo). Keratins (cam 5.2, others) in hgh-omas and prolactinomas are usually perinuclear. Nesp55 is new and often perinuclear in adenomas. At present, i don't know of any treatment decisions that will be based solely on either of these immunostaining staining patterns.
Answered 12/26/2013
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Maybe adenoma: Perinuclear staining means that the cells stained around the nucleus, but it doesn't tell what exactly stained. Pituitary adenomas, which are benign tumors, can show perinuclear staining with an antibody to cytokeratin. Looking at staining patterns is one way to tell the difference between types of pituitary tumors. We need more information from your pathology report to answer this.
Answered 3/17/2014
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