title: Detection of axillary lymph node metastasis with diffusion-weighted MR imaging.
abstract: The feasibility of detecting axillary lymph node (LN) metastases with diffusion-weighted MR imaging was retrospectively evaluated. The relative ADC (with b values of 0 and 1000 s/mm(2)) between LNs in each axillary space was calculated (n=75). The area, the long and short diameter of the metastatic LNs were compared to those of non-metastatic LNs. The relative ADC value of metastatic LNs was significantly lower than that of non-metastatic LNs (P=.00). The long and short diameter LN diagnostic performance was superior to that of mean ADC and relative ADC (AUC: 0.84, 0.80 versus 0.64, 0.03), suggesting usefulness of diameter over ADC.
authors.affiliation: Dept of Diagnostic Radiology, Kyoto University Graduate School of medicine, Kyoto, Japan; Dept of Radiology, Kitano Hospital, Osaka, Japan. Electronic address: mamiiima@kuhp.kyoto-u.ac.jp.
authors.forename: Mami
authors.initials: M
authors.lastname: Iima
authors.affiliation: Dept of Diagnostic Radiology, Kyoto University Graduate School of medicine, Kyoto, Japan.
authors.forename: Masako
authors.initials: M
authors.lastname: Kataoka
authors.affiliation: Dept of Radiology, Kitano Hospital, Osaka, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Okumura
authors.affiliation: Dept of Diagnostic Radiology, Kyoto University Graduate School of medicine, Kyoto, Japan.
authors.forename: Kaori
authors.initials: K
authors.lastname: Togashi
mesh_terms: D000328:Adult; D000368:Aged; D001365:Axilla; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D003952:Diagnostic Imaging; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods*; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis / Q000175:diagnosis; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies
keywords: Apparent diffusion coefficient; Axillary lymph node; Breast cancer; Diffusion-weighted image