A member asked:

For the pathologists, when testing for antibodies, if there is a perinuclear staining of some cells of a human pituitary, what could this indicate?

4 doctors weighed in across 2 answers

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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Dr. Devon Webster answered

Specializes in Medical Oncology

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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