Difference between revisions of "Paired box gene 8"

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**Can help differentiate from lung NETs.
**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 |vauthors=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>
*Epithelial component of thymic tumors 77-100% depending on sub-type<ref name=pmid21552115/><ref name=pmid21836478>{{cite journal |vauthors=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 |vauthors=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==
==Negative staining==
[[Image:Lymphoma - lung - PAX8 -- intermed mag.jpg|thumb|right|300px|Negative PAX8 staining in a lymphoma.]]
[[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/>).
*[[Urothelial carcinoma]] - can be positive (3 positive/18 bladder tumours<ref name=pmid21552115/>).
*[[Lymphoma]].
*[[Lymphoma]] (beware false positive staining due to polyclonal PAX8 antibodies cross-reacting with [[PAX5]])<ref name=pmid22037256>{{cite journal |vauthors=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>
*[[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>



Revision as of 12:09, 14 November 2020

Paired box gene 8
Immunostain in short

PAX8 staining in a poorly differentiated carcinoma.
Abbreviation PAX8
Use RCC versus other, gynecologic tract malignancy versus other
Subspeciality gynecologic pathology, genitourinary pathology
Normal staining pattern nuclear stain
Positive renal cell carcinomas, renal oncocytoma, thyroid tumours, serous carcinoma, endometrial carcinomas

Paired box gene 8, commonly known by the abbreviation PAX8, is a commonly used immunostain in gynecologic pathology and genitourinary pathology.

Tumours with positive staining

May be positive

Negative staining

Negative PAX8 staining in a lymphoma.

See also

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Laury, AR.; Perets, R.; Piao, H.; Krane, JF.; Barletta, JA.; French, C.; Chirieac, LR.; Lis, R. et al. (Jun 2011). "A comprehensive analysis of PAX8 expression in human epithelial tumors.". Am J Surg Pathol 35 (6): 816-26. doi:10.1097/PAS.0b013e318216c112. PMID 21552115.
  2. Sangoi, AR.; Ohgami, RS.; Pai, RK.; Beck, AH.; McKenney, JK.; Pai, RK. (Mar 2011). "PAX8 expression reliably distinguishes pancreatic well-differentiated neuroendocrine tumors from ileal and pulmonary well-differentiated neuroendocrine tumors and pancreatic acinar cell carcinoma.". Mod Pathol 24 (3): 412-24. doi:10.1038/modpathol.2010.176. PMID 20890270.
  3. "Pax8 expression in thymic epithelial neoplasms: an immunohistochemical analysis". Am. J. Surg. Pathol. 35 (9): 1305–10. September 2011. doi:10.1097/PAS.0b013e3182260735. PMID 21836478.
  4. "PAX8 Expression in a Subset of Malignant Peritoneal Mesotheliomas and Benign Mesothelium has Diagnostic Implications in the Differential Diagnosis of Ovarian Serous Carcinoma". Am. J. Surg. Pathol. 41 (12): 1675–1682. December 2017. doi:10.1097/PAS.0000000000000935. PMID 28877056.
  5. "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". Mod. Pathol. 25 (2): 231–6. February 2012. doi:10.1038/modpathol.2011.162. PMID 22037256.
  6. Tacha, D.; Zhou, D.; Cheng, L. (Jul 2011). "Expression of PAX8 in normal and neoplastic tissues: a comprehensive immunohistochemical study.". Appl Immunohistochem Mol Morphol 19 (4): 293-9. doi:10.1097/PAI.0b013e3182025f66. PMID 21285870.