Japanese Journal of Radiology

, Volume 37, Issue 1, pp 81–87 | Cite as

The feasibility of dedicated breast PET for the assessment of residual tumor after neoadjuvant chemotherapy

  • Hiromi Koyasu
  • Satoshi GoshimaEmail author
  • Yoshifumi Noda
  • Hironori Nishibori
  • Makoto Takeuchi
  • Kengo Matsunaga
  • Tetsuya Yamada
  • Masayuki Matsuo
Original Article



To evaluate the utility of ring-type dedicated breast positron emission tomography (dbPET) for the detection of the residual tumor after neoadjuvant chemotherapy (NAC).

Materials and methods

This prospective study included 27 women with histologically proven breast cancer over a 37-month period. All patients underwent ring-type dbPET followed by whole-body PET-CT (WBPET) for preoperative tumor evaluation and re-staging after NAC. The maximum standardized uptake value (SUVmax) of the tumor lesion and the degree of confidence for the presence of the residual tumor were compared between pathological complete response (pCR) and non-pCR tumors. The sensitivity, specificity, and area under the receiver operating characteristic curve (AUC) for the detection of a non-pCR tumor were compared between dbPET and WBPET.


On dbPET, SUVmax was significantly higher in non-pCR than in pCR tumors (P = 0.030). The sensitivity for the detection of a non-pCR tumor was significantly higher with dbPET than with WBPET (84.2% vs 26.3%, P = 0.001). In the qualitative analysis, the sensitivity for the detection of a non-pCR tumor was also significantly higher with dbPET than with WBPET (57.9% vs 21.1%, P = 0.016).


The dbPET can provide more sensitive detection of residual tumor after NAC than can WBPET.


Breast cancer Dedicated breast positron emission tomography Whole-body PET-CT Residual tumor Neoadjuvant chemotherapy 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.


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Copyright information

© Japan Radiological Society 2018

Authors and Affiliations

  • Hiromi Koyasu
    • 1
    • 2
  • Satoshi Goshima
    • 1
    Email author
  • Yoshifumi Noda
    • 1
  • Hironori Nishibori
    • 2
  • Makoto Takeuchi
    • 3
  • Kengo Matsunaga
    • 4
  • Tetsuya Yamada
    • 4
  • Masayuki Matsuo
    • 1
  1. 1.Department of RadiologyGifu UniversityGifuJapan
  2. 2.Department of RadiologyKizawa Memorial HospitalMinokamoJapan
  3. 3.Department of Breast SurgeryKizawa Memorial HospitalMinokamoJapan
  4. 4.Department of PathologyKizawa Memorial HospitalMinokamoJapan

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