Breast Cancer

, Volume 18, Issue 2, pp 141–144

A false positive for metastatic lymph nodes in the axillary region of a breast cancer patient following mastectomy

  • Nobuko Fujiuchi
  • Toshiaki Saeki
  • Hideki Takeuchi
  • Hiroshi Sano
  • Takao Takahashi
  • Kazuo Matsuura
  • Takashi Shigekawa
  • Misono Misumi
  • Noriko Nakamiya
  • Katsuhiko Okubo
  • Akihiko Osaki
  • Takaki Sakurai
  • Hiroshi Matsuda
Case Report

DOI: 10.1007/s12282-009-0125-9

Cite this article as:
Fujiuchi, N., Saeki, T., Takeuchi, H. et al. Breast Cancer (2011) 18: 141. doi:10.1007/s12282-009-0125-9

Abstract

Recent advanced imaging modalities such as positron emission tomography (PET) detect malignancies using 2-[18F]-fluoro-2-deoxy-d-glucose (18-FDG) with high accuracy, and they contribute to decisions regarding diagnosis, staging, recurrence, and treatment response. Here, we report a case of false-positive metastatic lymph nodes that were diagnosed by PET/CT and ultrasonography in a 48-year-old breast cancer patient who had undergone mastectomy. The tumors, which were oval shaped and resembled lymph nodes, were detected by ultrasonography. PET/CT revealed high uptake of 18-FDG in the tumors. To investigate the proposed recurrence and to re-evaluate the biology of the recurrent tumors, a tumor was removed from the brachial plexus of the patient. Histological findings revealed it to be a schwannoma. All imaging modalities including PET/CT failed to distinguish benign tumors from metastatic lymph nodes in the brachial plexus. After resection of the schwannomas, the patient complained of a slight motor disorder of the second finger on the right hand. Hence, it is important to consider a false-positive case of lymph node metastasis in a breast cancer patient following mastectomy.

Keywords

Local recurrenceLymph node metastasisBreast cancerSchwannomaBrachial plexus

Copyright information

© The Japanese Breast Cancer Society 2009

Authors and Affiliations

  • Nobuko Fujiuchi
    • 1
  • Toshiaki Saeki
    • 1
  • Hideki Takeuchi
    • 1
  • Hiroshi Sano
    • 1
  • Takao Takahashi
    • 1
  • Kazuo Matsuura
    • 1
  • Takashi Shigekawa
    • 1
  • Misono Misumi
    • 1
  • Noriko Nakamiya
    • 1
  • Katsuhiko Okubo
    • 1
  • Akihiko Osaki
    • 1
  • Takaki Sakurai
    • 2
  • Hiroshi Matsuda
    • 3
  1. 1.Department of Breast OncologySaitama International Medical Center, Saitama Medical UniversityHidakaJapan
  2. 2.Department of PathologySaitama International Medical Center, Saitama Medical UniversityHidakaJapan
  3. 3.Department of Nuclear MedicineSaitama International Medical Center, Saitama Medical UniversityHidakaJapan