The Two-Stage Folded Paramedian Forehead Flap Without Cartilage Grafts for Full Thickness Distal Nasal Defects: A Review of 35 Patients

April 2024 | Volume 23 | Issue 4 | 262 | Copyright © April 2024


Published online March 28, 2024

Brett C. Neill MDa, Brett Shaffer BSb, Spyros M. Siscos MDc, Edward W. Seger MD MSc, Stanislav N. Tolkachjov MDd, Thomas L.H. Hocker MDb

aOregon Health and Science University, Portland, OR 
bAdvanced Dermatologic Surgery, Leawood, KS
cUniversity of Kansas Medical Center, Division of Dermatology, Kansas City, KS
dEpiphany Dermatology, Dallas, TX

Abstract
Background: Full thickness defects of the ala, soft triangle, and nasal tip involving the nasal lining have traditionally been repaired with the three-stage folded paramedian forehead flap (FPFF), with a cartilage graft for support. For similar defects, the authors utilize the two-stage FPFF without cartilaginous support which provides reproducible functional and aesthetic results. 
Objective: To describe the authors' experience with the two-stage FPFF, including outcomes, complications, and design modifications to enhance functional and aesthetic success. 
Methods: An IRB-approved retrospective database review of FPFF was performed at two sites. Using postoperative photographs, outcomes were assessed by blinded non-investigator dermatologist raters using a modified observer scar assessment scale.
Results: Thirty-five patients were reconstructed using the two-stage FPFF without cartilage grafts. Subjective assessment of scar vascularity, pigment, relief, and thickness by 3 independent reviewers yielded an overall cosmesis score of 8.4 +/- 1.9 (out of 40).
Conclusion: The two-stage FPFF without cartilage grafts is a reliable, cosmetically elegant repair that can provide optimal functional and aesthetic results for complex unilateral distal nose defects.

J Drugs Dermatol. 2024;23(4):262-267. doi:10.36849/JDD.7358

INTRODUCTION

A workhorse for full thickness nasal defects is the folded paramedian forehead flap (FPFF) owing to its ideal color, size, and texture, and its ability to restore cover, lining, and support. Even small defects that compromise the alar rim and involve the nasal lining and mucosa are challenging to reconstruct. It is vital to maintain the integrity of nasal mucosa because failure to do so can lead to fibrosis and stenosis of the nasal airway. Of utmost importance is maintaining the patency of the nasal valve to preserve inspiratory function. 

Replacing the lining is often tedious because of the poor visibility and surgical access. There are several traditional options to replace nasal lining during reconstruction, which often depend on the size and location of the defect.1,2 Small defects no more than a few millimeters can be closed primarily.2 Other options include hinge-over flaps, a second local flap (nasolabial flap or second forehead flap), a prelaminated and prefolded forehead flap,3 support grafts (composite skin graft or full thickness skin graft), intranasal lining flaps ("bucket-handle flap"), microvascular distant flaps, and the FPFF (traditionally three stages) in which the flap folds the forehead onto itself to line the nostril rim.1,2,4,5 However, hinge-over flaps have unpredictable vascularity, may occlude the airway, are difficult to mold with cartilage grafts, and may not survive if longer than 1.5 cm.6,7 A second local flap adds additional facial scars. A composite skin graft has variable survivability but can provide cover and lining for defects < 1.5 cm in size.1 A skin graft by itself cannot provide primary support because it must be placed against the flap's vascular bed to survive. The prelamination (prefabrication) technique is elegant but offers extreme technical mastery and cartilage harvesting. Lastly, skin from distant flaps does not match facial skin quality.  

Besides the FPFF, there are limited reconstructive options that will give satisfactory results in nasal defects larger than 1.5 cm that also require replacement of support or lining. A two-stage nasolabial interpolation flap or a Spear flap could be considered for a deep alar defect involving mucosa but is less commonly used for a defect larger than