Abstract
Purpose
Despite the widespread use of sentinel lymph node (SLN) biopsy in breast cancer patients, some controversy exists about the correct management of extra-axillary nodes, especially those located in the internal mammary chain. The aim of this study was to evaluate the incidence of SLNs in this region, calculate the lymphoscintigraphic and surgical detection rates and evaluate the clinical impact on staging and therapeutic decisions.
Methods
The study involved 383 consecutive women diagnosed with early breast cancer with T1 or T2 tumours. Eight patients had a bilateral tumour, which brought the total to 391 lesions. Lymphoscintigraphy was performed on the day before surgery by injection of 99mTc-labelled nanocolloid. The injection site was subdermal (68 patients), peritumoural (107 patients) or intratumoural (216 patients). During surgery a gamma probe was used to guide the surgeon and the SLNs were removed. SLNs were analysed by a conventional pathological study and processed for H&E examination and immunohistochemistry.
Results
Lymphoscintigraphy detected at least one SLN in 369 out of the 391 procedures (94.4%). SLNs were found in the axillary chain in 367 cases and in the internal mammary chain in 55. In two of these 55 cases (3.6%), the SLN was the only one detected. There was no drainage to the internal mammary chain in any case of subdermal injection but such drainage was found in 15.9% of cases with peritumoural injection and 17.6% of those with intratumoural injection. Compared with tumours located in the outer quadrants, a higher percentage of tumours located in the inner quadrants showed drainage to the internal mammary chain (p<0.001). A total of 42 SLNs in the internal mammary chain could be removed in 32 patients without appreciable morbidity. In 20 cases both axillary and internal mammary SLNs were negative, in four both were positive, and in five axillary SLNs were positive and internal mammary SLNs were negative. More interestingly, in the remaining patient with both axillary and internal mammary SLNs, the axillary SLN was negative while malignant cells were found in the internal mammary region. In the evaluation of the clinical impact of internal mammary SLN biopsy, we found that staging was modified from pN1a to pN1c in four patients and, more importantly, from pN0 to pN0(i+) in one patient. The change in stage led to a modification of the postoperative treatment plan with respect to radiotherapy and systemic therapy.
Conclusion
Evaluation of the SLNs in the internal mammary chain provides more accurate staging of breast cancer patients. If internal mammary sampling is not performed, patients can be understaged. This technique can offer a better indication of those patients who will benefit from selective treatment options like radiotherapy to this region or systemic therapy.
Similar content being viewed by others
References
Reintgen D, Cruse CW, Wells K, Berman C, Fenske N, Glass F, et al. The orderly progression of melanoma nodal metastases. Ann Surg 1994;6:759–67
Aarsvold JN, Alazraki NP. Update on detection of sentinel lymph nodes in patients with breast cancer. Semin Nucl Med 2005;35:116–28
Veronesi U, Cascinelli N, Bufalino R, Morabito A, Greco M, Galluzzo D, et al. Risk of internal mammary lymph nodes metastases and its relevance on prognosis of breast cancer patients. Ann Surg 1983;198:681–4
Freedman GM, Fowble BL, Nicolaou N, Sigurdson ER, Torosian MH, Boraas MC, et al. Should internal mammary lymph nodes in breast cancer be a target for the radiation oncologist? Int J Radiat Oncol Biol Phys 2000;46:805–14
Farrús B, Vidal-Sicart S, Velasco M, Zanón G, Fernández PL, Muñoz M, et al. Incidence of internal mammary node metastases after a sentinel lymph node technique in breast cancer and its implication in the radiotherapy plan. Int J Radiat Oncol Biol Phys 2004;60:715–21
Allweis TM, Badriyyah M, Bar Ad V, Cohen T, Freund HR. Current controversies in sentinel lymph node biopsy for breast cancer. Breast 2003;12:163–71
Noguchi M, Tsugawa K, Miwa K. Internal mammary chain sentinel lymph node identification in breast cancer. J Surg Oncol 2000;73:75–80
Johnson N, Soot L, Nelson J, Franzini D, Vea H, Gruner S, et al. Sentinel node biopsy and internal mammary lymphatic mapping in breast cancer. Am J Surg 2000;179:386–8
Estourgie S, Nieweg OE, Valdés Olmos RA, Rutgers EJ, Kroon BBR. Lymphatic drainage patterns from the breast. Ann Surg 2004;239:232–7
Galimberti V, Veronesi P, Arnone P, De Cicco C, Renne G, Intra M, et al. Stage migration after biopsy of internal mammary chain lymph nodes in breast cancer patients. Ann Surg Oncol 2002;9:924–8
Paganelli G, Galimberti V, Trifiro G, Travaini L, De Cicco C, Mazzarol G, et al. Internal mammary node lymphoscintigraphy and biopsy in breast cancer. Q J Nucl Med 2002;46:138–44
Uren RF, Howman-Giles R, Chung D, Thompson JF. Nuclear medicine aspects of melanoma and breast lymphatic mapping. Semin Oncol 2004;31:338–48
Nieweg O, Estourgie S, van Rijk M, Kroon B. Rationale for superficial injection techniques in lymphatic mapping in breast cancer patients. J Surg Oncol 2004;87:153–6
Ortega M, Vidal-Sicart S, Zanón G, Pahisa J, Santamaria G, Velasco M, et al. Comparative study of the different radiotracer administration route to locate the sentinel node in breast cancer. Rev Esp Med Nucl 2004;23:153–61
Tanis P, Nieweg OE, Valdés Olmos RA, Kroon BBR. Anatomy and physiology of lymphatic drainage of the breast from the perspective of sentinel node biopsy. J Am Coll Surg 2001;192:399–409
Jakub JW, Cox CE, Pipas AW, Gardner M, Pendas S, Reintgen DS. Controversial topics in breast lymphatic mapping. Semin Oncol 2004;31:324–32
van der Ent FW, Kengen RA, van de Pol HA, Povel JA, Stroeken HJ, Hoofwijk AG. Halsted revisited: internal mammary sentinel lymph node biopsy in breast cancer. Ann Surg 2001;234:79–84
Montgomery LL , Thorne AC, Van Zee KJ, Fey J, Heerdt AS, Gemignani M, et al. Isosulfan blue dye reactions during sentinel lymph node mapping for breast cancer. Anesth Analg 2002;95:385–8
Simmons R, Thevarajah S, Brennan MB, Christos P, Osborne M. Methylene blue dye as an alternative to isosulfan blue dye for sentinel lymph node localization. Ann Surg Oncol 2003;10:242–7
Cserni G, Szekeres JP. Internal mammary lymph nodes and sentinel node biopsy in breast cancer. Surg Oncol 2001;10:25–33
Benamor M, Nos C, Fréneaux P, Clough KB. Impact of internal mammary sentinel node imaging in breast cancer. Clin Nucl Med 2002;28:375–8
Acknowledgements
This work was supported in part by Instituto de Salud Carlos III, Red Temática del Cáncer no. C03/10.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Paredes, P., Vidal-Sicart, S., Zanón, G. et al. Clinical relevance of sentinel lymph nodes in the internal mammary chain in breast cancer patients. Eur J Nucl Med Mol Imaging 32, 1283–1287 (2005). https://doi.org/10.1007/s00259-005-1867-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00259-005-1867-z