title: Persistence of the embryonic lateral marginal vein: report of two cases.
abstract: OBJECTIVE
  Congenital venous malformations of the lower limbs represent a particular challenge for the vascular surgeon. Persistence of fetal veins is a rare malformation, and the most common is the persistence of the lateral marginal vein usually observed in patients with Klippel-Trenaunnay Syndrome. The persistence of this embryonic vein as an isolated venous malformation without the other characteristics of the Klippel-Trenaunnay Syndrome has not yet been reported. This paper describes two cases.
  
  
  METHODS
  Two patients, a 17-year-old male patient and a 16-year-old female, have had since their birth a large venous trunk in the lateral aspect of the right leg and thigh. The limbs underwent duplex scanning and phlebography. The surgical removal of the lateral marginal vein was performed.
  
  
  RESULTS
  Surgical treatment resulted in very good functional and aesthetic results. Follow-up at 26 months showed no evidence of varicose vein recurrence.
  
  
  CONCLUSIONS
  To achieve good results, surgical intervention may be indicated in cases of orthopedic deformity, hemorrhage, symptomatic, and unaesthetic lesions.
authors.affiliation: Department of Vascular Surgery, Hospital das Clínicas, Faculty of Medicine, University of São Paulo, Brazil.
authors.forename: R
authors.initials: R
authors.lastname: Rojas Martinez
authors.forename: P
authors.initials: P
authors.lastname: Puech-Leão
authors.forename: P M
authors.initials: PM
authors.lastname: Guimarães
authors.forename: B M
authors.initials: BM
authors.lastname: Netto
mesh_terms: D000293:Adolescent; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007715:Klippel-Trenaunay-Weber Syndrome / Q000601:surgery*; D007866:Leg / Q000098:blood supply* / Q000601:surgery; D008297:Male; D010690:Phlebography; D014680:Veins / Q000002:abnormalities* / Q000601:surgery