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Erschienen in: Breast Cancer Research and Treatment 1/2011

01.07.2011 | Clinical Trial

Monitoring of neoadjuvant chemotherapy using multiparametric, 23Na sodium MR, and multimodality (PET/CT/MRI) imaging in locally advanced breast cancer

verfasst von: Michael A. Jacobs, Ronald Ouwerkerk, Antonio C. Wolff, Edward Gabrielson, Hind Warzecha, Stacie Jeter, David A. Bluemke, Richard Wahl, Vered Stearns

Erschienen in: Breast Cancer Research and Treatment | Ausgabe 1/2011

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Abstract

We prospectively investigated using advanced magnetic resonance imaging (MRI) and positron emission tomography/computed tomography (PET/CT) to identify radiological biomarkers for treatment response in patients receiving preoperative systemic therapy (PST) for locally advanced breast cancer. Patients with a stage II or III breast cancer receiving PST were selected and underwent positron emission tomography (PET), magnetic resonance imaging (MRI), and breast biopsies at baseline and after the first cycle of PST (days 7–8) during the full course of treatment. PET/CT was acquired after injection of 2-deoxy-2-[18F]-fluoro-d-glucose (18FDG, 0.22 mCi/kg) and quantified with standardized uptake value assessment (SUV). Diagnostic breast MRI and sodium (23Na) was acquired at 1.5 T. Total tissue sodium concentration (TSC), response criteria in solid tumors (RECIST), and volumes were quantified. Treatment response was determined by pathological assessment at surgery. Immunohistochemistry values of the proliferative index (Ki-67) were performed on biopsy specimens. Six of nineteen eligible women (43 ± 11 years) who received PST underwent radiological imaging of 18FDG-PET/CT and MRI for at least two cycles of treatment. Five patients had a pathological partial response (pPR) and one had pathological non-response (pNR). TSC decreased 21% in responders with increases in the non-responder (P = 0.03). Greater reduction in SUV was observed in responders (38%) compared to the non-responder (22%; P = 0.03). MRI volumes decreased after cycle 1 by 42% (responders) and 35% (non-responder; P = 0.11). Proliferation index Ki-67 declined in responders in the first cycle (median = 47%, range = 29–20%), but increased (4%) in the non-responder. Significant decreases in TSC, SUV, and Ki-67 were observed in responders with increases in TSC and Ki-67 in non-responders. Our results demonstrate the feasibility of using multi-modality proton, 23Na MRI, and PET/CT metrics as radiological biomarkers for monitoring response to PST in patients with operable breast cancer.
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Metadaten
Titel
Monitoring of neoadjuvant chemotherapy using multiparametric, 23Na sodium MR, and multimodality (PET/CT/MRI) imaging in locally advanced breast cancer
verfasst von
Michael A. Jacobs
Ronald Ouwerkerk
Antonio C. Wolff
Edward Gabrielson
Hind Warzecha
Stacie Jeter
David A. Bluemke
Richard Wahl
Vered Stearns
Publikationsdatum
01.07.2011
Verlag
Springer US
Erschienen in
Breast Cancer Research and Treatment / Ausgabe 1/2011
Print ISSN: 0167-6806
Elektronische ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-011-1442-1

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