Nd:YAG/Er:YAG dual laser vs. topical steroid to treat vulvar lichen sclerosus: study protocol of a randomized controlled trial

A randomized controlled trial to evaluate a novel dual laser therapy for vulvar lichen sclerosus: exploratory study assessing the impact of menopausal status

OBJECTIVE

A randomized controlled trial showed that Neodymium:YAG/Erbium:YAG laser therapy was safe and significantly improved clinical outcomes and subjective symptoms of vulvar lichen sclerosus (LS). Most improvements were similar to those after the recommended first-line therapy with topical steroid. In this exploratory study, we wanted to analyze the impact of menopausal status on perception and treatment outcome.

METHODS

Sixty-six women with clinical lichen sclerosus were assigned to the laser or the steroid arm (2:1). Participants of the laser arm received four laser treatments with a follow-up of 6 months after treatment initiation. Clinical objective (LS score) and subjective outcomes (vulvovaginal symptoms questionnaire [VSQ], symptom visual analogue scale [VAS] score, patient satisfaction) were evaluated.

RESULTS

Nineteen of the 66 study participants were premenopausal, 47 postmenopausal. At baseline, premenopausal women were significantly younger (39.4 vs 67.4 yr, P < 0.001), only a few applied local estrogen (16% vs 74%, P < 0.001), and their VSQ score was higher (9.58 vs 7.32, P = 0.015) indicating more severe vulvovaginal symptoms. Laser therapy objectively led to similar clinical improvements for pre- and postmenopausal women (-2.62 vs -2.23, P = 0.437), but subjectively to a significantly higher improvement of the VSQ score in postmenopausal women (-4.13 vs -1.08, P = 0.005). Postmenopausal women were more satisfied with laser therapy than premenopausal women (71% vs 46%, P = 0.002).

CONCLUSION

Compared to premenopausal women, postmenopausal women experienced a lower subjective burden of the disease and a better subjective improvement after laser therapy. Perceptions and expectations are age-dependent and should be considered when treating women with lichen sclerosus.

Update vulval dermatology - diagnostics and therapy

The vulva is a periorificial skin area and as such represents a transitional zone with unique functional and physiological characteristics. Knowledge of its anatomy is limited among both the general population and healthcare professionals, and unrealistic expectations of normal proportions are common. Ignorance of anatomical variations can cause unnecessary anxiety. In Germany, specialists in gynecology and obstetrics most commonly treat neoplastic vulvar dermatoses, while chronic inflammatory dermatoses commonly affecting the female genitalia (such as psoriasis, atopic dermatitis, hidradenitis suppurativa, and vitiligo) are typically treated by dermatologists. Both specialties treat infectious vulvar dermatoses and sexually transmitted infections. Certain dermatoses, such as lichen sclerosus, lichen planus, and lichen simplex chronicus, tend to affect the vulva preferentially; however, terminology can be confusing. Therefore, this article provides basic information on vulvar anatomy and physiology and summarizes recommendations for the diagnosis and management of the most common vulvar dermatoses, with a special focus on chronic inflammatory dermatoses, to provide a useful guide for all involved specialists in daily practice. Interdisciplinary collaboration and the establishment of dedicated consultation hours may help to improve the clinical care of vulvar dermatoses.

Lasers in Gynecology

The first published reports on the use of laser for cervical pathology date back to 1973. Technical advancements in flexible and rigid laser fibers revolutionized video laser laparoscopy in the 1990s. Fractionated lasers have been used to treat vulvovaginal symptoms associated with genitourinary syndrome of menopause, lichen sclerosus, and urinary incontinence. Review of available data suggests that fractionated lasers can improve both subjective and objective signs of vaginal atrophy and lichen sclerosus, but the evidence is weak because most of the trials are underpowered, are at risk for bias, and lack long-term follow-up. There is no strong evidence to support fractionated laser therapy for urinary incontinence or low-level laser therapy for chronic pelvic pain. Although short-term, single-arm trials suggest benefit of fractionated laser therapy for genitourinary syndrome of menopause, lichen sclerosus, and urinary incontinence, additional adequately powered, prospective, randomized, and longer-term comparative trials are needed before lasers can be recommended for these specific conditions. The purpose of this Clinical Expert Series is to review basic laser biophysics and the mechanism of action for modern fractionated lasers as relevant to the gynecologist. We also summarize safety and effectiveness data for lasers used for some of the most commonly studied gynecologic conditions: the vulvovaginal atrophy component of genitourinary syndrome of menopause, lichen sclerosus, and urinary incontinence.

Nd:YAG/Er:YAG dual laser compared with topical steroid to treat vulvar lichen sclerosus: A randomised controlled trial

OBJECTIVE

To evaluate the efficacy and safety of a novel non-ablative Nd:YAG/Er:YAG dual laser treatment for vulvar lichen sclerosus (LS) in comparison with the recommended first-line therapy with topical steroid.

DESIGN

A randomised investigator-initiated active-controlled trial.

SETTING

Single tertiary referral centre.

POPULATION

Women with vulvar LS.

METHODS

Randomisation (2:1) to Nd:YAG/Er:YAG laser therapy or topical clobetasol proprionate therapy. Four laser treatments at 0, 1, 2 and 4 months or decreasing doses of steroid for 6 months.

MAIN OUTCOME MEASURES

The primary outcome was the change in objective validated clinical LS score in the laser arm between baseline and 6 months. Secondary outcomes were laser tolerability/safety, symptom scores and patient satisfaction.

RESULTS

Sixty-six women were included, 44 in the laser group and 22 in the steroid group. The total LS score decreased by -2.34 ± 1.20 (95% CI -2.71 to -1.98) in women treated with laser compared with a decrease of -0.95 ± 0.90 (95% CI -1.35 to -0.56) in those receiving steroid applications (p < 0.001). Laser treatment was safe and well tolerated. Subjective severity scores (on visual analogue scale) and vulvovaginal symptoms questionnaire scores improved similarly for the laser and steroid arms without significant differences between the two treatments. Patient satisfaction was higher in the laser arm than in the steroid arm (p = 0.035).

CONCLUSIONS

Non-ablative dual Nd:YAG/Er:YAG laser therapy was safe and significantly improved clinical outcome and subjective symptoms at the 6-month follow up. This suggests that laser may be a promising alternative to corticosteroid therapy. However, the authors caution regular follow ups because of the premalignant nature of the disease.