Clinical Presentation and Surgical Outcomes of Congenital Divided Nevus of the Eyelids in Three Filipino Patients: A Case Series

Congenital divided nevus of the eyelids is a rare form of melanocytic nevus which involves contiguous portions of the upper and lower eyelid margins unilaterally, hence the term 'kissing nevus'. While usually present at birth, these nevi may also appear later in life. When the mass enlarges, it may cause cosmetic issues to the patient, as well as functional problems such as mechanical ptosis, ectropion, and epiphora. We report three cases of congenital divided nevus of the eyelids, all presenting with unilateral upper and lower hyperpigmented lid masses since birth. The first case had an upper lid mass measuring 11 mm x 19 mm, and a lower lid mass measuring 55 mm x 47 mm, with both masses extending into the palpebral conjunctiva, and causing severe ptosis and corneal neovascularization due to chronic irritation. The second case presented with hyperpigmented masses at the lateral third of the right upper eyelid measuring 8 mm x 17 mm and of the lower eyelid measuring 9 mm x 15 mm on the lower lid with lashes growing through the masses. There was extension of the mass into the palpebral conjunctiva. The third case presented with a 23 x 18 mm hyperpigmented, well-circumscribed, verrucated mass at the medial half of the upper eyelid crossing the eyelid margin, and a 15 x 13 mm lesion at the medial third of the lower lid with the same characteristics, with small crusty lesions and clotted blood. All three patients underwent excision biopsy with lid reconstruction using full thickness skin grafts from the supraclavicular area. Six months post-operatively, the first case underwent a repeat full thickness skin graft due to graft contraction, and also received two sessions of fractional carbon dioxide (CO₂) laser, two sessions of intralesional triamcinolone injections, and silicone gel application with further improvement of graft healing and scarring. The second case also underwent two sessions of intralesional steroid injection for scar management. During follow-up, which spanned 13 months for the first case, 10 months for the second case, and two months for the third case, improved functional and cosmetic outcomes were observed. This case series highlights the outcomes of the most common surgical technique done for congenital divided nevi of the eyelids. Congenital divided nevi are usually diagnosed clinically and malignant degeneration is rare, hence lid reconstruction may be done without frozen section. The cases in the series were treated due to cosmetic and functional purposes, hence the importance of continuous post-operative follow-up to monitor for graft dehiscence, scar development, recurrence of the mass, malignant degeneration, and development of lid malposition. Additional procedures for scar management, such as CO₂ laser and intralesional steroid injections, may be necessary to further enhance outcomes in complex cases. All three cases in this series exhibited improved functional and cosmetic outcomes post-operatively, with significant reduction in ptosis and scarring. Long-term follow-up revealed satisfactory recovery with minimal complications, with no recurrence nor malignant degeneration.