title: Sentinel Lymph Node Biopsy in Breast Cancer: Indications, Contraindications, and Controversies.
abstract: Axillary lymph node status, a major prognostic factor in early-stage breast cancer, provides information important for individualized surgical treatment. Because imaging techniques have limited sensitivity to detect metastasis in axillary lymph nodes, the axilla must be explored surgically. The histology of all resected nodes at the time of axillary lymph node dissection (ALND) has traditionally been regarded as the most accurate method for assessing metastatic spread of disease to the locoregional lymph nodes. However, ALND may result in lymphedema, nerve injury, shoulder dysfunction, and other short-term and long-term complications limiting functionality and reducing quality of life. Sentinel lymph node biopsy (SLNB) is a less invasive method of assessing nodal involvement. The concept of SLNB is based on the notion that tumors drain in an orderly manner through the lymphatic system. Therefore, the SLN is the first to be affected by metastasis if the tumor has spread, and a tumor-free SLN makes it highly unlikely for other nodes to be affected. Sentinel lymph node biopsy has become the standard of care for primary treatment of early breast cancer and has replaced ALND to stage clinically node-negative patients, thus reducing ALND-associated morbidity. More than 20 years after its introduction, there are still aspects concerning SLNB and ALND that are currently debated. Moreover, SLNB remains an unstandardized procedure surrounded by many unresolved controversies concerning the technique itself. In this article, we review the main indications, contraindications, and controversies of SLNB in breast cancer in the light of the most recent publications.
authors.affiliation: From the *Regional Center of Nuclear Medicine, Hospital University of Pisa, Pisa; †Department of Nuclear Medicine, S. Maria della Misericordia Hospital, Rovigo, Italy; ‡Biophysique, Faculté de Médecine Lyon Sud, Médecine Nucléaire, Hospices Civils de Lyon, Lyon, France; §Unit of Senology, Hospital University of Pisa, Pisa, Italy; and ∥Department of Radiology, University of Southern California, Los Angeles, CA.
authors.forename: Gianpiero
authors.initials: G
authors.lastname: Manca
authors.forename: Domenico
authors.initials: D
authors.lastname: Rubello
authors.forename: Elisa
authors.initials: E
authors.lastname: Tardelli
authors.forename: Francesco
authors.initials: F
authors.lastname: Giammarile
authors.forename: Sara
authors.initials: S
authors.lastname: Mazzarri
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Boni
authors.forename: Sotirios
authors.initials: S
authors.lastname: Chondrogiannis
authors.forename: Maria Cristina
authors.initials: MC
authors.lastname: Marzola
authors.forename: Serena
authors.initials: S
authors.lastname: Chiacchio
authors.forename: Matteo
authors.initials: M
authors.lastname: Ghilli
authors.forename: Manuela
authors.initials: M
authors.lastname: Roncella
authors.forename: Duccio
authors.initials: D
authors.lastname: Volterrani
authors.forename: Patrick M
authors.initials: PM
authors.lastname: Colletti
mesh_terms: D001943:Breast Neoplasms / Q000473:pathology*; D000075202:Contraindications; D005260:Female; D006801:Humans; D021701:Sentinel Lymph Node Biopsy / Q000009:adverse effects / Q000379:methods*