The nasalis musculocutaneous flap; a report of three cases

The LN Flap for Nasal Defect Reconstruction: An 84-case Experience with a Novel Technique

Background:

The nose is a common site for cutaneous malignancy and post-ablative reconstruction. To our knowledge, a myocutaneous island flap based on the levator labii superioris alaeque nasi (LLSAN) and nasalis muscles, with vascularity from the lateral nasal and angular arteries, has not been described for reconstruction of the lower lateral nose.

Methods:

A retrospective chart review of patients who underwent LLSAN-nasalis island flap reconstruction between 2015 and 2019 was performed. The surgical technique involved marking of an inverted-V flap on the nasal sidewall. The skin lateral to the flap was then developed in the subcutaneous plane to expose the LLSAN muscle and divide its origin on the maxillary frontal process and its caudal insertions into the alar dermis. The medial incision was down to periosteum and perichondrium, and dissection beneath the flap separated it from the nasal support structure. The resultant flap had a great caudal mobility. The donor site was closed in a V-to-Y pattern.

Results: In total,

84 procedures were completed, mostly for alar defects (57.1%) between 100 and 400 mm² (71.4%). The average age of patients was 74.9 years. An estimated 27 patients were lost to follow-up. At mean follow-up of 24.3 weeks, there were no cases of flap necrosis, 1 case of hematoma (1.8%), 1 case of infection (1.8%), 3 cases of persistent trapdoor deformity (5.3%), and 3 cases of alar notching (5.3%), 1 of whom required revision surgery.

Conclusion:

The LLSAN-nasalis myocutaneous island flap is a simple, reliable technique for resurfacing lateral lower nasal defects up to 2 × 2 cm.

Levator alae nasi muscle V-Y island flap for nasal tip reconstruction

Nasal tip reconstruction can be very challenging. It requires close attention to skin texture, colour and thickness matching, with the respect of the nasal aesthetic units and symmetry. Flaps are usually preferred to skin grafts where possible. Based on different donor areas, various flaps have been described for reconstruction of this region. Here we present a new V-Y myocutaneous island flap based on the levator alae nasi muscle (LAN muscle) blood supply. This flap may represent an alternative to the nasalis myocutaneous sliding V-Y flap previously described by Rybka. As its pivot point it is located more cranially than the nasalis flap, and it can advance more medially than the Rybka flap, with the possibility of covering larger defects of the nasal tip area, up to 1.8 cm in diameter. Over the past 5 years, 24 patients received nasal tip reconstruction with this flap following the resection of basal cell carcinomas. Good tip projection was maintained, and the aesthetic outcome was satisfactory, with well healed scars. We recommend this technique as an alternative to other flaps for nasal tip defects, especially if paramedian.

Facial artery in the upper lip and nose: anatomy and a clinical application

Twenty-five facial arteries were examined radiographically in 19 fresh cadavers that had been injected systemically with a lead oxide-gelatin mixture. Major branches of the facial artery in the upper lip and nose were investigated, and the anatomical variations were classified into three types on the basis of the anatomy of the lateral nasal artery, which was determined as an artery running toward the alar base. In 22 cases (88 percent), the facial artery bifurcated into the lateral nasal artery and superior labial artery at the angle of the mouth. In two cases (8 percent), the facial artery became an angular artery after branching off into the superior labial artery and the lateral nasal artery sequentially. In one case (4 percent), the facial artery became an angular artery after branching off into the superior labial artery, and the lateral nasal artery then branched off from the superior labial artery. Branches from the lateral nasal and superior labial arteries were observed stereographically. Vascular anastomoses between those branches were created in the upper lip, columella base, and nasal tip, and an intimate vascular network was formed. With a vascular network in the mucosa of the upper lip, a bilobed upper-lip flap was created for a clinical case with a full-thickness defect of the ala.