title: A rare case of isolated wound implantation of colorectal adenocarcinoma complicating an incisional hernia: case report and review of the literature.
abstract: BACKGROUND
  The reported case illustrates an instance of colonic adenocarcinoma presenting as an isolated tumour 3 1/2 years after open surgery. The presentation was in some respects unique as it was complicated by an incisional hernia and occurred in the anterior abdominal wall. A literature review was performed.
  
  
  METHODS
  An 83 year old lady initially underwent an extended right open hemicolectomy for a mid-transverse colonic adenocarcinoma (T4N2M0). No adjacent structures were involved. After adjuvant chemotherapy, she was kept under regular surveillance. A CT scan and colonoscopy at one year were normal. At 18 months investigations including an ultrasound scan of the liver and a radioisotope bone scan were all negative. Over three and half years later the patient presented with an incisional hernia. Repeat CT scan and tumour markers were reported as negative. At operation, a mass was found within the anterior abdominal wall complicating the incisional hernia. This mass was widely resected and a laparotomy performed. Histology confirmed an adenocarcinoma of colonic origin extending to one of the lateral margins. A post-operative PET scan confirmed the absence of intra-abdominal pathology.
  
  
  CONCLUSIONS
  The literature regarding recurrence of colonic tumours after open surgery reports low incidences of this occurring within abdominal incisions. The literature indicates prognosis is poor, but the numbers are small and distinction is often not made between isolated recurrence and those with other sites of tumour recurrence. In order to avoid missing isolated wound implantation, careful consideration should be given to those who present with new pathology related to previous cancer surgery incisions, both clinically and radiologically.
authors.affiliation: Department of General Surgery, Queen Mary's Hospital Sidcup, Sidcup, UK. aninda_chandra@hotmail.com
authors.forename: Aninda
authors.initials: A
authors.lastname: Chandra
authors.forename: Lester
authors.initials: L
authors.lastname: Lee
authors.forename: Fahad
authors.initials: F
authors.lastname: Hossain
authors.forename: Harnaik
authors.initials: H
authors.lastname: Johal
mesh_terms: D034861:Abdominal Wall / Q000473:pathology; D000230:Adenocarcinoma / Q000150:complications / Q000556:secondary* / Q000601:surgery*; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D003082:Colectomy / Q000379:methods; D015179:Colorectal Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006555:Hernia, Ventral / Q000150:complications* / Q000175:diagnosis / Q000601:surgery*; D006801:Humans; D007150:Immunohistochemistry; D033162:Incidental Findings; D007813:Laparotomy; D019042:Muscle Neoplasms / Q000473:pathology / Q000556:secondary* / Q000601:surgery; D018570:Risk Assessment; D013997:Time Factors; D016896:Treatment Outcome