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VENTANA® anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody

CE-IVD
IVD For in vitro diagnostic use.
HER2

Leading the way in HER2 testing

The use of pre-diluted VENTANA anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody1, in combination with the fully automated BenchMark IHC/ISH slide staining instrument, standardises all IHC processes from baking through staining, and reduces the possibility of human error. It also minimizes inherent variability resulting from individual reagent dilution and other processes found in manual and semi-automated IHC methods.

The Roche HER2 (4B5) clone* empowers you to:

  • Achieve consistently high proficiency assessment scores compared to other clones2
  • Employ the most widely adopted and reliable HER2-IHC primary antibody2
  • Demonstrate high concordance with HER2 FISH3,4
test

VENTANA® HER2 (4B5) Rabbit Monoclonal Primary Antibody RxDx

CE-IVD

Building on the same proven technology of the widely adopted HER2 (4B5) assay, Roche has delivered the only test approved to identify HER2-low breast cancer patients - helping match even more women with highly effective personalised therapies.

Consistent performance and superior quality

The Roche HER2 (4B5) clone* has shown the most consistent performance and superior quality when compared to other on-market HER2 clones.2

*Refers to the PATHWAY anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody and VENTANA anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody products.

VENTANA PATHWAY HER2 4B5 breast cancer stain diagram

Criteria for intensity and pattern of cell membrane staining with VENTANA anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody in breast carcinoma:

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Criteria for intensity and pattern of cell membrane staining with VENTANA anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody in breast carcinoma:

Criteria for Intensity and Pattern of Cell Membrane Staining with VENTANA HER2 (4B5) antibody in Breast Carcinoma:
Staining Pattern Score
(Report to Treating Physician)
HER2 Staining Assessment
No membrane staining is observed 0 Negative
Faint, partial staining of the membrane in any proportion of the cancer cells 1+ Negative
Weak complete staining of the membrane, > 10% of cancer cells 2+

Equivocal*

Intense complete staining of the membrane, > 10% of cancer cells 3+ Positive
* Recommend reflex to ISH

Criteria for intensity and pattern of cell membrane staining with VENTANA anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody in gastric carcinoma:

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Criteria for intensity and pattern of cell membrane staining with VENTANA anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody in gastric carcinoma:

Staining Pattern - Resection Specimen

Score (Report to requesting physician) HER2 Staining Assessment
No reactivity or membranous reactivity in < 10% of tumour cells 0 Negative
Faint/barely perceptible membranous reactivity in ≥ 10% of tumour cells; cells are reactive only in part of their membrane 1+ Negative
Weak to moderate complete, basolateral or lateral membranous reactivity in ≥ 10% of tumour cells 2+ Equivocal**
Strong complete, basolateral or lateral membranous reactivity in ≥ 10% of tumour cells 3+ Positive
* ≥ 5 cohesive cells ** Recommend reflex to ISH

References

  1. PATHWAY/VENTANA anti-HER2/neu (4B5) Rabbit Monoclonal Primary Antibody Package Inserts, 2019/2022.
  2. NordiQC Assessments. https://www.nordiqc.org/epitope.php; accessed November 2023
  3. Mayr D, et al. Comprehensive immunohistochemical analysis of Her-2/neu oncoprotein overexpression in breast cancer: HercepTest™ (Dako) for manual testing and Her-2/neuTest 4B5 (VENTANA) for VENTANA BenchMark automatic staining system with correlation to results of BenchMark automatic staining system with correlation to results of fluorescence in situ hybridization (FISH). Virchows Archiv. 2009; 454(3):241–248.
  4. Brügmann A, Lelkaitis G, Nielsen S, et al. Testing HER2 in breast cancer: a comparative study on BRISH, FISH, and IHC. Appl Immunohistochem Mol Morphol. 2011;19(3):203-211.
     

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