title: Metastatic rectal adenocarcinoma within haemorrhoids: a case report.
abstract: BACKGROUND
  Metastatic tumour involvement of the anal canal is rare. Routine pathological evaluation of haemorrhoidectomy specimens has been suggested to be unhelpful and expensive. Selective rather than routine pathological evaluation of haemorrhoidectomy specimens has been recommended.
  
  
  METHODS
  We report the case of a 69-year-old woman with metastatic colorectal carcinoma who presented with metastatic carcinoma within thrombosed haemorrhoids.
  
  
  CONCLUSIONS
  We suggest that in patients with colorectal cancer, careful examination of haemorrhoids on colonoscopy as well as histological examination of suspected haemorrhoidal tissue after surgical resection be performed to evaluate for metastasis.
authors.affiliation: St Lukes Cancer Centre, Royal Surrey County Hospital, Guildford, Surrey, UK. gjrdor001@yahoo.com
authors.forename: Dorothy M
authors.initials: DM
authors.lastname: Gujral
authors.forename: Sanjeev
authors.initials: S
authors.lastname: Bhattacharyya
authors.forename: Peter
authors.initials: P
authors.lastname: Hargreaves
authors.forename: Gary W
authors.initials: GW
authors.lastname: Middleton