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CASE REPORT
Synchronous recurrence of concurrent colon adenocarcinoma and dedifferentiated liposarcoma
  1. Eric E Jung1,
  2. F Scott Heinemann2,
  3. Colt A Egelston3,
  4. Jennifer Wang1,
  5. Raphael E Pollock4,
  6. Peter P Lee3 and
  7. William W Tseng1
  1. 1 Department of Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA
  2. 2 Department of Pathology, Hoag Memorial Hospital Presbyterian, Newport Beach, California, USA
  3. 3 Department of Immuno-Oncology, City of Hope National Medical Center, Duarte, California, USA
  4. 4 Department of Surgery, The James Comprehensive Cancer Center, Ohio State University, Columbus, Ohio, USA
  1. Correspondence to Dr William W Tseng, william.tseng{at}med.usc.edu

Abstract

A 62-year-old man presented with concurrent sigmoid colon adenocarcinoma and small bowel mesenteric dedifferentiated liposarcoma. Following surgical resection of the colon cancer, complete excision of the mesenteric sarcoma and adjuvant folinic acid, fluorouracil and oxaliplatin (FOLFOX) chemotherapy, the patient demonstrated no radiological evidence of disease for more than 2 years. The patient then developed synchronous recurrence of both cancers: the colon cancer metastasised to the liver and a pelvic lymph node, and the liposarcoma recurred in the original location. The patient underwent additional chemotherapy with complete response of the metastatic colon cancer and stable disease for the liposarcoma. The recurrent mesenteric tumour was subsequently resected. Although concurrent cancers have been reported, this unique case of synchronous recurrence raises interesting hypotheses regarding host–tumour interaction and immune surveillance.

  • immunology
  • surgical oncology
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Footnotes

  • Contributors EEJ and WWT: conception and design, planning, acquisition of data, analysis and interpretation of data, drafting and revision of the manuscript. FSH, CAE, JW and PPL: conception and design, planning, acquisition of data, analysis and interpretation of data, critical revision of the manuscript. REP: conception and design, planning, analysis and interpretation of data, critical revision of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Obtained.

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