Skin diseases of the vulva: eczematous diseases and contact urticaria

A systematic review of allergic and irritant contact dermatitis of the vulva: The most important allergens/irritants and the role of patch testing

Vulvar allergic contact dermatitis (vACD) and irritant contact dermatitis (vICD) are common and accompanied by a great burden on the patient's life. We aimed to review the existing literature on vACD and vICD in order to provide a comprehensive reference list of potential vulvar allergens and irritants, as well as to establish the role of patch testing therein. A systematic search was performed in Medline, Embase and Web of Science using a search string based on the PICO-format. The study protocol was registered at PROSPERO (CRD42021239527). Multiple allergens were identified and included metals, topical drugs, fragrances, preservatives, cosmetic constituents and rubber components. Not all positive reactions were, however, considered to be relevant. Patch testing is the primary tool for the identification of the causal allergens. Testing with standard series alone was proven to be insufficient. Little information about irritants was found. In the future, additional series and late readings should be considered in standard practice. Studies on vICD are scarce and further research is necessary. More population-based research should be performed.

Dermatographism with vulvar symptoms

Dermatographism (DG) is characterized by a localized, inducible, wheal-and-flare response along the distribution of mechanical pressure. We report an illustrative case of DG with vulvar symptoms (DG-VS) and review the literature on this rarely recognized but easily treated etiology of vulvar complaints. A 35-year-old woman presented with a 1-year history of vulvar pruritus unresponsive to antifungal, antibacterial, and steroid treatments. A prior punch biopsy was nondiagnostic. Vulvar examination revealed normal architecture and no cutaneous abnormalities. She was markedly dermatographic with a scratch test. DG-VS was diagnosed. The patient achieved complete symptomatic control on low-dose hydroxyzine. She maintains excellent control at 3.5 years. In the literature, a typical patient with DG-VS is of reproductive age, with several years’ history of vulvar symptoms (itching, burning, pain, or swelling) and repeated empiric treatment for infectious/inflammatory etiologies. Exacerbation with sexual activity, menstruation, or wearing tight clothing is characteristic and supports the role of mechanical pressure in inducing focal symptoms. Dermatologic changes to the vulvar skin are rarely noted. DG-VS is diagnosed based on clinical findings, symptom patterns, and a positive scratch test and is treated with antihistamines. DG-VS remains absent from current vulvar disease guidelines. In the complex world of vulvar pain and itch, an etiology so easily screened for and readily treated warrants consideration.

Glucocorticoid Receptor Beta and Its Prognostic Value on Treatment Response in Chronic Vulvar Dermatitis

BACKGROUND

Chronic vulvar dermatitis (CVD) is the most prevalent disease in gynecologic dermatology. The treatment mainly depends on topical glucocorticoids (TGC) but is challenged by insufficient treatment response. On a histological level, the upregulation of the glucocorticoid receptor β (GRβ), an inhibitor of the active glucocorticoid receptor α (GRα), is discussed as mechanism of glucocorticoid insensitivity.

OBJECTIVES

To analyze whether the expression of GRβ protein at baseline in keratinocytes may predict responsiveness to TGC in patients with CVD.

METHODS

In this retrospective cohort study, clinical and biological data of 25 women with a histological diagnosis of chronic vulvar eczema were analyzed. Randomization was done according to the responsiveness to TGC treatment (responsive vs. nonresponsive). Clinical data and the expression of GRβ in the immunohistochemical stained biopsies were examined.

RESULTS

Fifty-two percent of women with CVD were nonresponsive to TGC. GRβ was abundantly expressed in the cytoplasma of keratinocytes of the vulvar epithelium, but no difference in the level of expression was found among GC responsive and nonresponsive patients in the semiquantitative (p = 0.376) and quantitative analysis (p = 0.894).

CONCLUSION

GRβ is highly expressed in keratinocytes of the vulvar epidermis affected by CVD, but GRβ expression was not increased in patients nonresponsive to TGC compared to responsive patients. Thus, the failure mechanism in nonresponders still remains to be elucidated.

[Inflammatory Diseases of the Vulva - a Dermatologist's Point of View]

Inflammatory Diseases of the Vulva - a Dermatologist's Point of View Abstract. Inflammatory vulvar diseases include a variety of disorders - many of which have a chronic course with significant morbidity. Diagnosis and especially treatment can be challenging for the clinician and warrant an interdisciplinary approach. This review covers the most common non-infectious and non-malignant vulvar diseases - from a dermatological point of view. The typical clinical symptoms, clinical appearances, treatment modalities of the main non-infectious vulvar diseases are highlighted; additionally, important dermatological differential diagnoses which should not be forgotten will be mentioned.