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Rare disease
CASE REPORT
Mucinous adenocarcinoma arising from chronic perianal fistula mimicking horseshoe abscess
  1. Surya Nandan Prasad1,
  2. Abdul Razik2,
  3. Farhana Siddiqui3,
  4. Hira Lal1
  1. 1Department of Radiodiagnosis, SGPGIMS, Lucknow, Uttar Pradesh, India
  2. 2Department of Radiodiagnosis, All India Institute Of Medical Sciences, New Delhi, India
  3. 3Department of Pathology, Era’s Medical College and Hospital, Lucknow, Uttar Pradesh, India
  1. Correspondence to Dr Hira Lal, hiralal2007{at}yahoo.co.in

Summary

Perianal fistulae are commonly seen clinical entity. Development of malignancy within a perianal fistula is rare. Even rarer is the development of mucinous adenocarcinoma in a chronic fistula-in-ano. Only a handful of such cases have been reported in the past. A case of mucinous adenocarcinoma arising in chronic perianal fistula in a 34-year-old woman is being described. She presented with complaints of perineal fullness, pain and recurrent pus discharge from perianal fistula for 4 years. On radiological workup, a large solid-cystic pelvic mass was seen in relation to the fistula. On MRI, the lesion was mimicking a large horseshoe abscess. Transrectal ultrasound-guided biopsy and subsequent histopathological examination confirmed the presence of mucinous adenocarcinoma with tumour cells immunopositive for CK7 and CK20.

  • radiology (diagnostics)
  • colon cancer
  • radiology
  • gastrointestinal surgery
  • surgical oncology

https://doi.org/10.1136/bcr-2017-223063

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    Footnotes

    • Contributors SNP and HL conceived the manuscript. SNP prepared the manuscript. AR and FS collected the images and also helped in manuscript preparation. SNP and HL edited the manuscript. The final manuscript was read and approved by all the authors.

    • 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.

    • Patient consent Obtained.

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