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Bright-field HER2 dual in situ hybridization (DISH) assay on breast cancer cell blocks: a comparative study with histological sections
- Source :
- Breast Cancer (Tokyo, Japan)
- Publisher :
- Springer Nature
-
Abstract
- Background HER2 testing for samples from recurrent or metastatic disease is recommended by the 2013 update of the American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) guidelines and cytological analysis can be applied to several types of metastatic lesions. However, the practical method to assess the HER2 testing of breast cancer cytology specimens has yet to be resolved. Therefore, we conducted the bright-field HER2 dual in situ hybridization (DISH) assay on cell blocks (CBs) prepared from breast cancer cell samples as a validation study before clinical use. Methods CBs were prepared from tumor cell samples collected from 54 surgically excised breast tumors. The cells were fixed in 10 % buffered formalin for 16–28 h, and embedded in paraffin. The INFORM HER2/neu Dual ISH DNA Probe Cocktail was used for the DISH assay on the Ventana BenchMark ULTRA (Roche Diagnostics). Results Successful results were obtained in 51 of 54 CB specimens, and the results from the CB specimens were in agreement with those from the histological sections in 48 of the 51 cases (concordance rate, 94 %; kappa, 0.846). The intraclass correlation coefficient (ICC) between the CB and histological specimens in the continuous HER2/CEP17 signal count ratio was 0.89 (95 % CI 0.81–0.93), and the Pearson’s CC was 0.91 (95 % CI 0.85–0.94). Conclusion The HER2 DISH assay, utilizing 10 % buffered formalin-fixed CB, would be a reliable and ideal method to assess the HER2 gene status of breast cancer cytological specimens.
- Subjects :
- 0301 basic medicine
Validation study
Pathology
medicine.medical_specialty
Receptor, ErbB-2
Breast Neoplasms
In situ hybridization
Specimen Handling
DISH
03 medical and health sciences
Breast cancer
0302 clinical medicine
Surgical oncology
Cytology
Biomarkers, Tumor
Humans
Medicine
Radiology, Nuclear Medicine and imaging
Pharmacology (medical)
skin and connective tissue diseases
In Situ Hybridization
Cell block
Clinical Oncology
business.industry
HER2 gene
General Medicine
medicine.disease
030104 developmental biology
Oncology
Radiology Nuclear Medicine and imaging
030220 oncology & carcinogenesis
Female
Original Article
Breast cancer cells
business
Subjects
Details
- Language :
- English
- ISSN :
- 13406868
- Volume :
- 23
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Breast Cancer
- Accession number :
- edsair.doi.dedup.....4adb0ecd919e32d21dedb4a186f7271d
- Full Text :
- https://doi.org/10.1007/s12282-015-0664-1