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CASE REPORT
A solitary fibrous tumour mimicking an aggressive angiomyxoma/liposarcoma
  1. Grace Hwei Ching Tan,
  2. Deanna Ng,
  3. Tiffany Hennedige,
  4. Melissa Teo
  1. Division of Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
  1. Correspondence to Dr Melissa Teo, melissa.teo.c.c{at}singhealth.com.sg

Summary

We present a case of a solitary fibrous tumour (SFT) resembling an aggressive angiomyxoma/liposarcoma on radiological imaging, causing significant diagnostic challenges preoperatively. A 76-year-old male was incidentally found to have a large pelvic mass on a CT scan. Further evaluation with an MRI scan confirmed a presacral mass containing fat and soft tissue components. It was inseparable from the sacrococcygeal spine, rectal serosa and the posterior wall of the urinary bladder, but no evidence of invasion was seen. A prominent vascular pedicle arising from the epidural vasculature was also noted. Differentials discussed at the multidisciplinary tumour board were an aggressive angiomyxoma versus a liposarcoma. The patient underwent wide resection of the pelvic tumour, anterior resection and end colostomy. Intraoperatively, a large 20 cm pelvic mass involving the sigmoid mesocolon and presacral fascia was found. Final histology reported an SFT with extensive adipocytic metaplasia.

  • Cancer intervention
  • Oncology
  • Radiology
  • Surgery

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Footnotes

  • Contributors GHCT: conception or design of the paper, acquisition, analysis and interpretation of data for the paper, drafting the manuscript.

    DN: conception or design of the paper, acquisition, analysis and interpretation of data for the paper, drafting the manuscript.

    TH: acquisition, analysis and interpretation of data for the paper, revising manuscript for content.

    MT: conception or design of the paper, revising manuscript for content.

  • Competing interests None declared.

  • Patient consent Obtained.

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

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