False-positive local recurrences on FDG-PET/CT due to postoperative infection - A case report

Yoshiko Mori, Takeshi Nagasaka, Ryo Inada, Ayako Watanabe, Hiroyuki Kishimoto, Yoshitaka Kondou, Toshiyoshi Fujiwara

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Although 18F-fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) is a powerful tool for detecting the recurrence of colorectal cancer, FDG uptake is not tumor specific. Herein, we report a case of a 65-year-old man who underwent emergency colectomy for perforation of colon cancer. FDG-PET/CT after surgery showed 2 tumors that were difficult to differentiate from peritoneal metastases with invasion to the spleen. Splenectomy was performed, and the histopathology revealed that the tumors in fact were abscesses. This is a clinically thought-provoking case that showed the difficulty of the differential diagnosis between early recurrence after emergent surgery of colorectal cancer and the postoperative changes.

Original languageEnglish
Pages (from-to)1599-1601
Number of pages3
JournalGan to kagaku ryoho. Cancer & chemotherapy
Issue number12
Publication statusPublished - Nov 1 2014


  • Recurrent colorectal cancer

ASJC Scopus subject areas

  • Cancer Research
  • Oncology


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