title: [Microsurgical reconstruction of the nasal subunit defects].
abstract: OBJECTIVE
  The nose is composed of several delicate subunits, some of which are difficult to reconstruct if they have been injured. The paper presents the microsurgical technique to repair the nasal subunit defects with the free combined preauricular and auricular flap which well match the nasal tissues in texture, contour and color.
  
  
  METHODS
  The nasal subunit defects were repaired with the combined preauricular and auricular flap which were vascularized by the superficial temporal vascular system. The flap was harvested from the contralateral preauricular and the region of helix crus. The superficial temporal vessels were anastomosed to facial vessels via the vascular grafts harvested from the lateral circumfluent femoral vessels, which were about 10 to 14 cm in length. The helix crus of donor ear was reconstructed with the post-auricular flap.
  
  
  RESULTS
  28 cases were treated, including 3 cases of nasal tip defects, 9 cases of combined nasal alar and sidewall defects, and 16 cases of nasal alar defects. In these cases, the size of the subunit defects varied from 2.5 cm x 1.5 cm to 4 cm x 2.5 cm. 27 cases were successfully repaired with satisfactory results. The contour of reconstructed helix crus in donor site was acceptable. No walking dysfunction of the donor thigh was complained. There is one failed case, and the possible reason is the insufficient blood perfusion to the flaps, which may due to the patient's longtime-smoking status and the hypertension.
  
  
  CONCLUSIONS
  The technique of free combined preauricular and auricular flap is ideal for the reconstruction of nasal subunit defects.
authors.affiliation: Department of Plastic and Reconstructive Surgery, the Ninth People's Hospital, Shanghai Second Medical University, China.
authors.forename: Yun-liang
authors.initials: YL
authors.lastname: Qian
authors.forename: Yi-xin
authors.initials: YX
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.forename: Dan-ru
authors.initials: DR
authors.lastname: Wang
authors.forename: Yu-guang
authors.initials: YG
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000328:Adult; D054644:Ear Auricle / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008866:Microsurgery; D008875:Middle Aged; D009666:Nose / Q000002:abnormalities; D009667:Nose Deformities, Acquired / Q000601:surgery*; D012225:Rhinoplasty / Q000379:methods*; D016038:Skin Transplantation; D013524:Surgical Flaps; D055815:Young Adult