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Case Report
A case of accessory breast cancer mimicking metastatic lymph node from occult breast cancer
1 Senior Resident, Department of Breast Oncology and Surgery, Tokyo Medical University, Tokyo, Japan
2 Associate Professor, Tokyo Medical University Hachioji Medical Center, Tokyo, Japan
3 Associate Professor, Department of Anatomic Pathology, Tokyo Medical University, Tokyo, Japan
4 Assistant Professor, Department of Breast Surgery, Tokyo Medical University Ibaraki Medical Center, Tokyo, Japan
5 Professor, Department of Breast Oncology and Surgery, Tokyo Medical University, Tokyo, Japan
Address correspondence to:
Natsuki Uenaka
MD, Department of Breast Oncology and Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023,
Japan
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Article ID: 100036S05NU2019
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Uenaka N, Yamada K, Sato E, Kaise H, Ishikawa T. A case of accessory breast cancer mimicking metastatic lymph node from occult breast cancer. Edorium J Surg 2019;6:100036S05NU2019.ABSTRACT
Introduction: Primary breast cancer occurring in accessory breast tissue is rare. Presently, the diagnostic procedures and therapeutic approaches of this disease are not well established. Moreover, the rarity of this disease leads to its occasional misdiagnosis from other diseases.
Case Report: We report the case of a 69-year-old woman with accessory breast cancer who presented with a subcutaneous palpable mass in her right axillary region. The axillary mass was initially diagnosed as a metastatic lymph node from occult breast cancer at a previous hospital as her skin was intact without any sign of accessory breast. Radiological and pathological re-examination of a coreneedle biopsy (CNB) specimen from the tumor yielded a diagnosisof accessory breast cancer. We performed partial mastectomy of the mass and sentinel lymph node biopsy.
Conclusion: As this disease can be misdiagnosed and mistreated, additional clinical information regarding this disease would be highly beneficial. Although early diagnosis of accessory breast cancer may be difficult, the possibility of this disease should be considered when a palpable subcutaneous mass is detected.
Keywords: Accessory breast cancer, Lymph node, Occult breast cancer, Sentinel node biopsy
SUPPORTING INFORMATION
Acknowledgments
We thank Dr. Edward Barroga (https://orcid.org/0000- 0002-8920-2607) for reviewing and editing the manuscript.
Author Contributions:Natsuki Uenaka - Substantial contributions to conception and design, Acquisition of data, Analysis of data, Interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Kimito Yamada - Analysis of data, Interpretation of data, Revising it critically for important intellectual content, Final approval of the version to be published
Eiichi Sato - Analysis of data, Interpretation of data, Revising it critically for important intellectual content, Final approval of the version to be published
Hiroshi Kaise - Analysis of data, Interpretation of data, Revising it critically for important intellectual content, Final approval of the version to be published
Takashi Ishikawa - Substantial contributions to conception and design, Acquisition of data, Analysis of data, Interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Guaranter of SubmissionThe corresponding author is the guarantor of submission.
Source of SupportNone
Data AvailabilityAll relevant data are within the paper and its Supporting Information files.
Conflict of InterestAuthors declare no conflict of interest.
Copyright© 2019 Natsuki Uenaka et al. This article is distributed under the terms of Creative Commons Attribution License which permits unrestricted use, distribution and reproduction in any medium provided the original author(s) and original publisher are properly credited. Please see the copyright policy on the journal website for more information.
