Modified Mustardé and Superolateral Periosteal Flaps for Full-Thickness Defects of Medial and Central Lower Eyelid: A Case Series.

ABSTRACT

BACKGROUND: Reconstructing full-thickness defects involving 50% to 75% of the horizontal length of the lower eyelid after medial and central full-thickness block resection can be challenging. As a disadvanatge, 1-stage reconstructions may require a free graft reconstruction of the posterior lamella. In addition, 2-stage reconstructions are associated with several complications, including erythema, and the eye must be temporarily closed after surgery. METHODS: The present study describes a single-surgeon retrospective case series. Five patients diagnosed with basal cell carcinoma underwent wide full-thickness block resection with optimal excision margins (3-5 mm). Subsequently, 1-stage reconstruction was performed using the modified Mustardé flap, incised using the transconjunctival approach. This flap comprised the skin, muscle, tarsus, and conjunctival flap raised from the lateral canthus through a lateral cantholysis procedure, and then extended to the lateral cheek. The flap was medially transposed to cover the medial and central lower eyelid defect. The superolateral periosteal flap was harvested from the superolateral orbital rim attached to the lateral border of the tarsus of the modified Mustardé flap. The lateral forniceal conjunctiva was released from the retractor and advanced superiorly to cover the inner surface. RESULTS: The study included 3 men and 2 women, with a mean age of 71 years (range, 62-90 years). Histological evaluations confirmed tumor-free margins in all cases. The average follow-up duration was 20 months (6-60 months), with no tumor recurrence. None of the patients developed long-term complications, such as ectropion, entropion, lagophthalmos, trichiasis, symblepharon, erythema, wound dehiscence, or flap necrosis. All patients had minimal scarring, and no secondary surgical interventions were necessary. CONCLUSIONS: This case series demonstrates the efficacy of the combined modified Mustardé and superolateral periosteal flaps in 1-stage reconstruction of full-thickness defects involving 50% to 75% of the horizontal length of the medial and central lower eyelid without compromising functional and aesthetic outcomes.