{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T05:05:46Z","timestamp":1768280746854,"version":"3.49.0"},"reference-count":28,"publisher":"Wiley","issue":"14","license":[{"start":{"date-parts":[[2012,1,17]],"date-time":"2012-01-17T00:00:00Z","timestamp":1326758400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cancer"],"published-print":{"date-parts":[[2012,7,15]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>BACKGROUND:<\/jats:title><jats:p>The objective of this study was to confirm, by means of a multicenter study conducted in Japan, the reliability and usefulness of the one\u2010step nucleic acid amplification (OSNA) assay in routine clinical use for sentinel lymph node biopsy (SLNB) of breast cancer patients.<\/jats:p><\/jats:sec><jats:sec><jats:title>METHODS:<\/jats:title><jats:p>Patients with Tis\u2010T2N0M0 breast cancer who underwent SLNB before systemic chemotherapy comprised the study cohort. A whole sentinel lymph node (SLN) was examined intraoperatively with the OSNA assay except for a 1\u2010mm\u2010thick, central slice of the lymph node, which underwent pathologic examination after the operation. For patients who underwent axillary dissection, non\u2010SLNs were examined with routine pathologic examination.<\/jats:p><\/jats:sec><jats:sec><jats:title>RESULTS:<\/jats:title><jats:p>In total, 417 SLNBs from 413 patients were analyzed. SLN metastases were detected with greater sensitivity by the OSNA assay than by pathologic examination (22.5% vs 15.8%; <jats:italic>P<\/jats:italic> &lt; .001), as expected from the difference in size of the specimens examined. Patients who had SLN metastases assessed with the OSNA assay proved to harbor non\u2010SLN metastases with an overall risk ratio of 33.7%. The risk of non\u2010SLN metastasis was significantly lower for patients who had positive SLNs assessed as OSNA+ than for those who had SLNs assessed as OSNA++ (17.6% vs 44%; <jats:italic>P<\/jats:italic> = .012).<\/jats:p><\/jats:sec><jats:sec><jats:title>CONCLUSIONS:<\/jats:title><jats:p>The OSNA assay can be used for routine clinical SLNB, and its assessment for volume of metastasis may be a powerful predictive factor for non\u2010SLN metastasis. Further studies with more patients are needed to confirm the usefulness of this assay for selection in the clinical setting of patients who do not need axillary dissection. Cancer 2012;3477\u20133483. \u00a9 2012 American Cancer Society.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cncr.26683","type":"journal-article","created":{"date-parts":[[2012,1,17]],"date-time":"2012-01-17T15:40:03Z","timestamp":1326814803000},"page":"3477-3483","source":"Crossref","is-referenced-by-count":49,"title":["Routine clinical use of the one\u2010step nucleic acid amplification assay for detection of sentinel lymph node metastases in breast cancer 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