Detection of extra-axillary lymph node involvement with FDG PET/CT in patients with stage II-III breast cancer

FDG PET/CT detected extra-axillary lymph node involvement in almost one-third of the patients with stage II-III breast cancer, including regions not evaluable with ultrasound. FDG PET/CT may be useful as an additional imaging tool to assess extra-axillary lymph node metastasis, with an impact on the adjuvant radiotherapy management.