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Difference between revisions of "Paired box gene 8"
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| Use = RCC versus other, gynecologic tract malignancy versus other | | Use = RCC versus other, gynecologic tract malignancy versus other | ||
| Subspecial = [[gynecologic pathology]], [[genitourinary pathology]] | | Subspecial = [[gynecologic pathology]], [[genitourinary pathology]] | ||
| Pattern = | | Pattern = nuclear stain | ||
| Positive = [[renal cell carcinoma]]s, [[renal oncocytoma]], thyroid tumours, [[serous carcinoma]], [[endometrial carcinoma]]s | | Positive = [[renal cell carcinoma]]s, [[renal oncocytoma]], thyroid tumours, [[serous carcinoma]], [[endometrial carcinoma]]s | ||
| Negative = | | Negative = | ||
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*Nonserous epithelial [[ovarian tumours|ovarian neoplasms]] ~ 70%.<ref name=pmid21552115/> | *Nonserous epithelial [[ovarian tumours|ovarian neoplasms]] ~ 70%.<ref name=pmid21552115/> | ||
*[[Endometrial carcinoma]]s ~ 98%.<ref name=pmid21552115/> | *[[Endometrial carcinoma]]s ~ 98%.<ref name=pmid21552115/> | ||
*[[Pancreatic neuroendocrine tumour]] ~ 74%.<ref name=pmid20890270>{{Cite journal | last1 = Sangoi | first1 = AR. | last2 = Ohgami | first2 = RS. | last3 = Pai | first3 = RK. | last4 = Beck | first4 = AH. | last5 = McKenney | first5 = JK. | last6 = Pai | first6 = RK. | title = PAX8 expression reliably distinguishes pancreatic well-differentiated neuroendocrine tumors from ileal and pulmonary well-differentiated neuroendocrine tumors and pancreatic acinar cell carcinoma. | journal = Mod Pathol | volume = 24 | issue = 3 | pages = 412-24 | month = Mar | year = 2011 | doi = 10.1038/modpathol.2010.176 | PMID = 20890270 }}</ref> | |||
**Can help differentiate from lung NETs. | |||
*Epithelial component of thymic tumors 77-100% depending on sub-type<ref name=pmid21552115/><ref name=pmid21836478>{{cite journal |authors=Weissferdt A, Moran CA |title=Pax8 expression in thymic epithelial neoplasms: an immunohistochemical analysis |journal=Am. J. Surg. Pathol. |volume=35 |issue=9 |pages=1305–10 |date=September 2011 |pmid=21836478 |doi=10.1097/PAS.0b013e3182260735 |url=}}</ref> | |||
===May be positive=== | |||
*Peritoneal [[malignant mesothelioma]] (5 +ve of 27<ref name=pmid28877056>{{cite journal |authors=Chapel DB, Husain AN, Krausz T, McGregor SM |title=PAX8 Expression in a Subset of Malignant Peritoneal Mesotheliomas and Benign Mesothelium has Diagnostic Implications in the Differential Diagnosis of Ovarian Serous Carcinoma |journal=Am. J. Surg. Pathol. |volume=41 |issue=12 |pages=1675–1682 |date=December 2017 |pmid=28877056 |doi=10.1097/PAS.0000000000000935 |url=}}</ref>). | |||
==Negative staining== | |||
[[Image:Lymphoma - lung - PAX8 -- intermed mag.jpg|thumb|right|300px|Negative PAX8 staining in a lymphoma.]] | |||
*[[Urothelial carcinoma]] - can be positive (3 positive/18 bladder tumours<ref name=pmid21552115/>). | |||
*[[Lymphoma]] (beware false positive staining due to polyclonal PAX8 antibodies cross-reacting with [[PAX5]])<ref name=pmid22037256>{{cite journal |authors=Moretti L, Medeiros LJ, Kunkalla K, Williams MD, Singh RR, Vega F |title=N-terminal PAX8 polyclonal antibody shows cross-reactivity with N-terminal region of PAX5 and is responsible for reports of PAX8 positivity in malignant lymphomas |journal=Mod. Pathol. |volume=25 |issue=2 |pages=231–6 |date=February 2012 |pmid=22037256 |doi=10.1038/modpathol.2011.162 |url=}}</ref> | |||
*[[Malignant melanoma]].<ref name=pmid21285870>{{Cite journal | last1 = Tacha | first1 = D. | last2 = Zhou | first2 = D. | last3 = Cheng | first3 = L. | title = Expression of PAX8 in normal and neoplastic tissues: a comprehensive immunohistochemical study. | journal = Appl Immunohistochem Mol Morphol | volume = 19 | issue = 4 | pages = 293-9 | month = Jul | year = 2011 | doi = 10.1097/PAI.0b013e3182025f66 | PMID = 21285870 }}</ref> | |||
*Salivary gland and salivary gland tumours.<ref>{{cite journal |authors=Butler RT, Alderman MA, Thompson LD, McHugh JB |title=Evaluation of PAX2 and PAX8 expression in salivary gland neoplasms |journal=Head Neck Pathol |volume=9 |issue=1 |pages=47–50 |date=March 2015 |pmid=24771139 |pmc=4382472 |doi=10.1007/s12105-014-0546-4 |url=}}</ref> | |||
==See also== | ==See also== | ||