TITLE

NY-BR-1 and PAX8 immunoreactivity in breast, gynecologic tract, and other CK7+ carcinomas: potential use for determining site of origin

AUTHOR(S)
Woodard, Anna H.; Jing Yu; Dabbs, David J.; Beriwal, Sushil; Florea, Anca V.; Elishaev, Esther; Davison, Jon M.; Krasinskas, Alyssa M.; Bhargava, Rohit; Yu, Jing
PUB. DATE
September 2011
SOURCE
American Journal of Clinical Pathology;Sep2011, Vol. 136 Issue 3, p428
SOURCE TYPE
Academic Journal
DOC. TYPE
journal article
ABSTRACT
The distinction between breast and müllerian carcinomas from each other and from tumors with a similar cytokeratin profile can be difficult. We tested the usefulness of 2 new markers, NY-BR-1 and PAX8, by staining a variety of breast and gynecologic carcinomas, along with tumors of pancreas, bile ducts, stomach, and gastroesophageal junction. NY-BR-1 expression (ie, H score >10) was seen in 58.4% of breast carcinomas (111/190), 5.6% of müllerian carcinomas (8/142), 7% of pancreatic tumors (1/15), 0% of cholangiocarcinomas (0/22), 0% of gastric tumors (0/36), and 0% of gastroesophageal carcinomas (0/25). All 188 breast carcinomas were negative for PAX8. PAX8 expression was seen in 72.4% of müllerian tumors (105/145). All pancreatic tumors (n = 15), cholangiocarcinomas (n = 23), and gastric (n = 35) and gastroesophageal junction (n = 25) carcinomas were negative for PAX8. Addition of NY-BR-1 and PAX8 in a panel would be useful in distinguishing breast cancer, gynecologic tumors, and tumors of the upper gastrointestinal tract.
ACCESSION #
70108915

 

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