Purpose
Exploration of the internal mammary vessels during microsurgical reconstruction presents an ideal opportunity for identifying and sampling the internal mammary lymph node (IMLN) basin.
Methods
A retrospective review of patients undergoing microsurgical breast reconstruction using the internal mammary vessels as recipient vessels was conducted from March 2000 to December 2014. Patient demographics, tumor characteristics, preoperative lymph node mapping, reconstructive timing, and outcomes were studied.
Results
A total of 524 microsurgical breast reconstructions in 516 patients were performed using the internal mammary vessels. IMLNs were sampled in 53 immediate and 42 delayed breast reconstructions. Eight (seven in the immediate and one in the delayed group) of the sampled nodes were positive for cancer metastasis, for an incidence of 8.4% in identified lymph nodes. All patients with metastatic IMLNs subsequently received local-regional radiation and chemotherapy. All patients were alive, and six were disease-free at the conclusion of the study period, which had an average follow up of 67.3 months.
Conclusion
Incidentally encountered IMLNs during microsurgical breast reconstruction are frequently positive. With negligible downside and the possibility to provide additional information for treatment, the procedure should be encouraged. J. Surg. Oncol. © 2016 Wiley Periodicals, Inc.
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