Fractional CO₂ laser treatment as adjunctive therapy to topical steroids for managing vulvar lichen sclerosus

Uncontrolled vulvar lichen sclerosus (VLS) is often associated with distressful symptoms of genital itch, irritation, and pain and can lead to a pathological process including anatomical changes, scarring, and an elevated risk of cancer in the genital area. First-line topical corticosteroid as monotherapy is frequently not adequate to fully suppress disease activity and control symptoms. This study evaluated the efficacy of fractional CO₂ laser treatments as adjunctive therapy where recalcitrant VLS had been improved, but not adequately controlled, with topical corticosteroid treatment. Outcomes were evaluated up to 12 months after a series of CO₂ laser treatments delivered via a fractional handpiece.

Women with a diagnosis of VLS supported by histologic findings on biopsy and/or clinical signs on physical examination received up to five monthly laser treatments. Subjects maintained existing topical corticosteroid and any exogenous hormone treatment during the study. Investigators assessed severity (0 = not present, 1 = mild, 2 = moderate, or 3 = severe) of clinical signs and architectural changes present before adjunctive study interventions and at follow-up visits. Subjects reported the presence of clinical symptoms and impact on quality of life on 4- or 5-point Likert scales. The validated Female Sexual Function Index (FSFI) was used to assess changes in sexual function. Four subjects were biopsied before adjunctive laser treatment and at follow-up.

Twelve females, 11 postmenopausal, with a mean age of 57 ± 10 years received three to five monthly CO₂ laser treatments. Significant improvement in all prominent clinical signs and architectural changes were reported at the 3- and 6-month follow-ups after the treatment series. Significant improvement was maintained at the 12-month follow-up, with 89% of subjects showing at least one-point improvement in elasticity compared to baseline; 86% in lichenification; 88% in sclerosis; and 80% in whitening and parchment-like skin. Labial fusion and the extent of disease improved in 50% of patients. Ulcerations present in three subjects at baseline resolved after treatment. Subjects reported 86% improvement in dyspareunia and 83% in skin tearing. Quality of life improved significantly after treatment (p < 0.01). The 6-month follow-up FSFI showed significant improvement in sexual function compared to baseline (p < 0.05), with a mean point improvement of 4.5. Histology findings after treatment showed some positive improvement, as a decrease in dermal hyalinized zone thickness. There were no treatment complications or adverse events related to the treatment.

Fractional CO₂ laser treatment outcomes showed improvement in predominant clinical signs and architectural changes in VLS recalcitrant to topical corticosteroid treatment. Adjunctive laser treatment relieved symptoms and improved quality of life as well as sexual function. Fractional CO₂ laser treatment may provide an advanced treatment modality for the management of recalcitrant VLS with improved patient care and sustainable outcomes. Further study in a larger population and with CO₂ laser treatment to both vulvar tissue and the vaginal canal should be explored.