title: Liver metastasis of ethmoid sinus adenocarcinoma.
abstract: BACKGROUND
  Sinonasal cancer is an uncommon neoplasm, often associated with exposure to occupational hazards and delayed diagnosis.
  
  
  METHODS
  The authors report a rare case of solitary liver metastasis from ethmoid sinus adenocarcinoma treated by surgical resection. No clinical or radiological sign of recurrence was observed with a follow-up of 3 months.
  
  
  CONCLUSIONS
  Adenocarcinoma of the ethmoid sinus is characterized by its aggressiveness and its tendency to recurrence. Metastases are rare and can be found in unexpected organs due to dissemination via collateral venous plexuses. The role of chemotherapy has not been clearly established. Due to their rarity, the treatment of metastases has not yet been defined.
authors.affiliation: Service ORL et chirurgie cervico-faciale, centre hospitalier Alto Ave, rue dos Cutileiros, Creixomil, Guimarães, Portugal. Electronic address: caselhos@msn.com.
authors.forename: S
authors.initials: S
authors.lastname: Caselhos
authors.affiliation: Service radiothérapie, institut Portugais d'oncologie, Porto, Portugal.
authors.forename: C
authors.initials: C
authors.lastname: Ferreira
authors.affiliation: Service d'anatomie pathologique, institut Portugais d'oncologie, Porto, Portugal.
authors.forename: M
authors.initials: M
authors.lastname: Jácome
authors.affiliation: Service ORL et chirurgie cervico-faciale, institut Portugais d'oncologie, Porto, Portugal.
authors.forename: E
authors.initials: E
authors.lastname: Monteiro
mesh_terms: D000230:Adenocarcinoma / Q000556:secondary* / Q000601:surgery; D005005:Ethmoid Sinus / Q000473:pathology / Q000601:surgery; D006498:Hepatectomy / Q000379:methods; D006801:Humans; D008113:Liver Neoplasms / Q000556:secondary* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010255:Paranasal Sinus Neoplasms / Q000473:pathology* / Q000601:surgery; D011379:Prognosis; D016896:Treatment Outcome
keywords: Endonasal surgery; Ethmoid sinus adenocarcinoma; Liver metastasis; Sinonasal malignant tumours; Vertebral venous plexus