title: Arterial Anastomosis in the Tongue.
abstract: OBJECTIVE
  Radical surgery for neoplasms of the tongue can endanger at least 1 lingual artery, threatening the survival of the remaining tissue and the recovery of speech and swallowing. Although there is little anastomosis in the substance of the tongue, this study investigated whether arterial anastomoses outside the tongue could provide collateral circulation to protect the surviving tissue.
  
  
  METHODS
  Parts of 9 embalmed cadaver heads were examined. In 2 specimens, the arteries had been previously injected with latex and India ink. In the remaining, a mixture of latex and India ink was injected into the lingual artery at its origin on 1 side. Five injections were successful.
  
  
  RESULTS
  There was considerable variation in the course and distribution of the lingual arteries. Arteries did not cross the midline of the tongue, but actual or potential anastomoses could be seen round the base of the tongue, in the floor of the mouth, and with facial artery branches. After the experimental injections, the mass filled the lingual artery and its branches on the injected side, but also reached the trunk and main branches of the opposite side.
  
  
  CONCLUSIONS
  A mass injected into the lingual artery of 1 side can reach the trunk and territory of the lingual artery of the opposite side. In life, it is likely that a similar collateral circulation would exist. Some clinical literature supports this conclusion, but preoperative arteriography might be a reasonable precaution.
authors.affiliation: Graduate Teaching Assistant, Laboratory of Human Anatomy, School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.
authors.forename: Jennifer
authors.initials: J
authors.lastname: O'Neill
authors.affiliation: Honorary Research Fellow, Laboratory of Human Anatomy, School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.
authors.forename: John
authors.initials: J
authors.lastname: Shaw-Dunn
authors.affiliation: Consultant Ear, Nose, and Throat, Head and Neck Surgeon and Clinical Lead, Department of Ear, Nose, and Throat Head, Head and Neck Surgery, Glasgow Royal Infirmary, Glasgow, UK.
authors.forename: Stuart
authors.initials: S
authors.lastname: Robertson
authors.affiliation: Senior University Teacher and Licensed Teacher of Anatomy, Laboratory of Human Anatomy, School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK. Electronic address: Paul.Rea@glasgow.ac.uk.
authors.forename: Paul
authors.initials: P
authors.lastname: Rea
mesh_terms: D000714:Anastomosis, Surgical / Q000379:methods; D001158:Arteries / Q000601:surgery*; D006801:Humans; D012039:Regional Blood Flow; D014059:Tongue / Q000098:blood supply / Q000601:surgery*