Abstract
Background
In breast cancer, a combination of radioisotope and blue dye mapping maximizes the success and accuracy of sentinel node (SLN) biopsy. When multiple radioactive nodes are present, there is no single definition of isotope success, but the popular “10% rule” dictates removal of all SLN with counts >10% of the most radioactive node. Here we determine how frequently a positive SLN would be missed by the 10% rule.
Methods
Between 9/96 and 12/04, we performed 6,369 successful SLN biopsies using 99mTc sulfur colloid and isosulfan blue dye, removing as SLN all radioactive and/or blue nodes, and taking counts from each node ex vivo. Standard processing of all SLNs with a benign frozen section included hematoxylin and eosin (H&E) staining, serial sectioning, and immunohistochemistry (IHC).
Results
33% of patients (2,130/6,369) had positive SLNs. Of these patients, 1,387/2,130 (65%) had >1 SLN identified. The most radioactive SLN was benign in 29% (398/1,387), and 107/1,387 (8%) had a positive SLN that was neither blue nor the hottest. From this group 1.7% (24/1387) of patients had positive SLN with counts <10% radioactive counts of the hottest node. The 10% rule captured 98.3% of positive nodes in patients with multiple SLNs. No patient characteristics were predictive of failure of the 10% rule.
Conclusion
With combined isotope and blue dye mapping, the 10% rule is a robust guideline and fails to identify only 1.7% (24/1387) of all SLN-positive patients with multiple SLNs. This guideline appears to be equally valid for all subsets of patients.
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References
Hill ADK, Tran KN, Akhurst T et al. Lessons learned from 500 cases of lymphatic mapping for breast cancer. Ann Surg 1999;229:528–35
Cox CE, Pendas S, Cox JM et al. Guidelines for sentinel node biopsy and lymphatic mapping of patients with breast cancer. Ann Surg 1998;227:645–53
McMasters KM, Tuttle TM, Carlson DJ et al. Sentinel lymph node biopsy for breast cancer: a suitable alternative to routine axillary dissection in multi-institutional practice when optimal technique is used. J Clin Oncol 2000;18:2560–6
O’Hea BJ, Hill ADK, El-Shirbiny et al. Sentinel lymph node biopsy in breast cancer: initial experience at Memorial Sloan Kettering Cancer Center. J Am Coll Surg 1998;186:423–7
Canavese G, Gipponi M, Catturich A et al. Sentinel node mapping in early-stage breast cancer: technical issues and results with vital blue dye mapping and radioguided surgery. J Surg Oncol 2000;74:61–8
Bobin JY, Spirito C, Isaac S et al. Lymph node mapping and axillary sentinel lymph node biopsy in 243 invasive breast cancers with no palpable nodes. The Lyon Sud Hospital experience. Ann Chir 2000;125:861–70
Cody HS, Fey J, Akhurst T et al. Complementarity of blue dye and isotope in sentinel node localization for breast cancer: univariate and multivariate analysis of 966 procedures. Ann Surg Oncol 2001;8:13–9
Derossis AM, Fey J, Yeung H et al. A trend analysis of the relative value of blue dye and isotope localization in 2,000 consecutive cases of sentinel node biopsy for breast cancer. J Am Coll Surg 2001;193:473–8
Radaovanovic Z, Golubovic A, Plzak A et al. Blue dye versus blue dye-radioactive tracer technique in detection of sentinel lymph node in breast cancer. Eur J Surg Oncol 2004;30:913–7
Kim T, Giuliano AE, Lyman GH. Lymphatic mapping and sentinel lymph node biopsy in early-stage breast carcinoma: a metaanalysis. Cancer 2006;106:4–16
Morton DM, Bostick PJ. Will the true sentinel node please stand? Ann Surg Oncol 1999;6:12–4
Martin RCG, Edwards MJ, Wong SL et al. Practical guidelines for optimal gamma probe detection of sentinel lymph nodes in breast cancer: results of a multi-institutional study. Surgery 2000;128:139–44
McCarter MD, Yeung H, Fey J et al. The breast cancer patient with multiple sentinel nodes: when to stop? J Am Coll Surg 2001;192:692–7
Albertini JJ, Lyman GH, Cox C et al. Lymphatic mapping and sentinel node biopsy in the patient with breast cancer. JAMA 1996;276:1818–22
Krag D, Weaver D, Ashikaga T et al. The sentinel node in breast cancer. N Engl J Med 1998;339:941–6
Veronesi U, Paganelli G, Galimberti V et al. Sentinel-node biopsy to avoid axillary dissection in breast cancer with clinically negative lymph nodes. Lancet 1997;349:1864–7
Martin RCG, Fey J, Yeung H et al. Highest isotope count does not predict sentinel node positivity in all breast cancer patients. Ann Surg Oncol 2001;8:592–7
Crossin JA, Johnson AC, Stewart PB et al. Gamma-probe-guided resection of the sentinel lymph node in breast cancer. Am Surg 1998;64:666–8
McMasters KN, Reintgen DS, Ross MI et al. Sentinel lymph node biopsy for melanoma: how many radioactive nodes should be removed? Ann Surg Oncol 2001;8:192–7
Wong SL, Edwards MJ, Chao C et al. Sentinel lymph node biopsy for breast cancer: impact of the number of sentinel nodes removed on the false-negative rate. J Am Coll Surg 2001;192:684–9
Song XY, Yuan XM, Chen WJ et al. Different criteria for radioactive sentinel lymph nodes has different impact on sentinel node biopsy in breast cancer patients. J Surg Oncol 2007;95:635–9
Jeruss JS, Hunt KK, Xing Y et al. Is intraoperative touch imprint cytology of sentinel lymph nodes in patients with breast cancer cost effective? Cancer 2006;107:2328–36
Agnese DM, Abdessalan SF, Burak WE et al. Cost-effectiveness of sentinel lymph node biopsy in thin melanomas. Surgery 2003;134:542–8
Langer I, Guller U, Berclaz G et al. Morbidity of sentinel lymph node biopsy alone versus SLN ans completion axillary lymph node dissection after breast cancer surgery: a prospective Swiss multicenter study on 659 patients. Ann Surg 2007;245:452–61
Kroon HM, Lowe L, Wong S et al. What is a sentinel node? Re-evaluating the 10% rule for sentinel lymph node biopsy in melanoma. J Surg Oncol 2007;95:623–8
Martin RCG, Chapgar A, Scoggins CR et al. Clinicopathologic factors associated with false-negative sentinel lymph-node biopsy in breast cancer. Ann Surg 2005;241:1005–15
Borgstein PJ, Pijpers R, Comans EF et al. Sentinel lymph node biopsy in breast cancer: guidelines and pitfalls of lymphoscintigraphy and gamma probe detection. J Am Coll Surg 1998;186:275–83
Goyal A, Newcombe RG, Chhabra A et al. Factors affecting failed localization and false-negative rates of sentinel node biopsy in breast cancer—results of the ALMANAC validation phase. Breast Can Res Treat 2006;99:203–8
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Chung, A., Yu, J., Stempel, M. et al. Is the “10% Rule” Equally Valid for All Subsets of Sentinel-Node-Positive Breast Cancer Patients?. Ann Surg Oncol 15, 2728–2733 (2008). https://doi.org/10.1245/s10434-008-0050-8
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DOI: https://doi.org/10.1245/s10434-008-0050-8