A Case of Resistance to Systemic Therapy in Hypermutation of Colorectal Cancer

  • Kana Tanaka
  • , Yoshifumi Shimada
  • , Yosuke Tajima
  • , Saki Yamada
  • , Shinnosuke Hotta
  • , Mae Nakano
  • , Masato Nakano
  • , Hitoshi Kameyama
  • , Kohei Miura
  • , Hiroshi Ichikawa
  • , Masayuki Nagahashi
  • , Hitoshi Nogami
  • , Satoshi Maruyama
  • , Yasumasa Takii
  • , Toshifumi Wakai

Research output: Contribution to journalArticlepeer-review

Abstract

A 78-year-old man was admitted with diarrhea. Colonoscopy and computed tomography(CT)revealed rectal cancer with multiple liver metastases. Low anterior resection was performed for local control. After the operation, 5 courses of mFOLFOX6 plus bevacizumab chemotherapy were administered as first-line systemic therapy, but CT showed progressive disease with liver metastases. After the first-line systemic therapy, 2 courses of FOLFIRI plus bevacizumab chemotherapy were performed as second-line systemic therapy, but CT also revealed progressive disease with liver metastases. We retrospectively performed comprehensive genomic sequencing with a 415-gene panel and found that the patient had a hypermutation subtype. Interestingly, the panel also revealed that he had mismatch-repair(MMR)deficiency with MSH2 mutation, which is reported as a possible cause of resistance to 5-fluorouracil in colorectal cancer.

Original languageEnglish
Pages (from-to)2476-2478
Number of pages3
JournalGan to kagaku ryoho. Cancer & chemotherapy
Volume45
Issue number13
Publication statusPublished - 01-12-2018

All Science Journal Classification (ASJC) codes

  • General Medicine

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