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Abstract #0283

Pre-surgical evaluation of residual cancer by breast MRI after neoadjuvant systemic treatment: DWI-based algorism

Rie Ota1, Masako Kataoka1, Maya Honda1, Shotaro Kanao2, Mami Iima1, Kanae Miyake Kawai1, Akane Ohashi1, Ayami Ohno Kishimoto1, Takaki Sakurai3, Tatsuki R Kataoka3, Masakazu Toi4, and Kaori Togashi1

1Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan, 2Kobe City Medical Center General Hospital, Kobe, Japan, 3Department of Pathology, Kyoto University Hospital, Kyoto, Japan, 4Department of Breast Surgery, Kyoto University Hospital, Kyoto, Japan

We aimed to re-evaluate DWI of pre-surgical MRI as a clue to diagnose pCR or non-pCR. DCE-MRI including kinetic information were also evaluated for comparison. DWI-based evaluation of residual disease in pre-surgical MRI demonstrate excellent diagnostic performance. On the other hand, residual disease is difficult to evaluate based on kinetic information. DWI-based evaluation of residual disease is a useful approach in pre-surgical evaluation of breast cancer following neoadjuvant systemic treatment.

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