The article provides comparative analysis of the current studies on the use of platelet-rich plasma (PRP) for the treatment of lichen sclerosus. The analysis includes 9 articles on efficiency of PRP in patients with genital lichen sclerosus. The article includes a listing of research and methods for evaluating the effect of therapy protocols. Most of the studies have shown a good therapeutic effect of the disease treatment with platelet-rich plasma. PRP may be used to quickly resolve subjective symptoms and reduce inflammation, as well as to treat synechia and cicatricial conditions. However, a problem concerning the mechanism of PRP, combined therapy with PRP, and topical steroids, has not been studied yet. It is necessary to conduct additional studies that will help to determine the number of procedures, and the interval between them. It is also necessary to develop criteria for evaluating the therapy effect, which includes histological examination.

The main manifestations of COVID-19 are primarily interstitial pneumonia and respiratory failure. No less than 20% of patients have variable skin rashes, which try to be interpreted as markers and predictors of the peculiarities of the course of coronavirus infection. In addition, hair loss is a characteristic manifestation of COVID-19, and the salivary follicles are regarded as a target for SARS-CoV-2. The most common variants of alopecia in patients with a new coronavirus infection or vaccine-induced alopecia are acute telogenic, nondescript, and androgenetic alopecia. This review provides information on the most common variants of hair loss in patients with SARS-CoV-2 infection, the features of their manifestations, and possible mechanisms of development. Acute telogenic hair loss is the most common variant of SARS-CoV-2-induced alopecia, is characteristic of patients with subacute course of COVID-19 and can be combined with trichodynia, anosmia and aguvia, which are markers of nervous syste damage. Given the variability in the time of onset after infection, a heterogeneous pathogenesis of alopecia can be assumed. Nested alopecia after COVID-19 is often a relapse of the disease, its severity and frequency do not correlate with the severity of the infectious disease, and its prevalence in women indicates the importance of hormonal factors in its development. Androgenetic alopecia may be a predictor of high risk of infection, severe course, and recurrence of COVID-19. The first two variants of alopecia may be associated with COVID-19 vaccination, and the latter is a predictor of inadequate immune response to vaccine administration. The mechanisms of the damaging effects of SARS-CoV-2 on hair follicles have not been fully deciphered and are most likely complex, with different leading links in different types of hair loss. Deciphering these mechanisms may provide prerequisites for understanding the mechanisms of COVID-19 damage to other tissues and organs.

Goal. To obtain information on typical errors in medical aid rendered to acne patients in dermatovenerology dispensaries in St. Petersburg in order to develop measures to improve the quality of medical aid rendered to this group of patients. Materials and methods. The authors conducted a special expert examination of 55 patients with acne who received treatment at St. Petersburg dermatovenerology dispensaries in 2013. The quality of medical aid was assessed using the Automated Expert Examination Technique (hereinafter referred to as AEET). Major results. The percentage of cases when medical aid of due quality was rendered to acne patients was 49%. Treatment and diagnostics errors prevailed in the structure of errors in medical aid. Errors in treatment were mainly a wrong combination of drugs, simultaneous administration of external and systemic antibacterial drugs, delayed comedolytic therapy and pathogenically infeasible therapy. Errors in diagnostics included absence of indications of the form and/or severity of acne. The most important error in the collection of information was absence of gynecology examinations for women to determine whether peroral contraceptives were necessary including in case of the administration of isotretinoin. Conclusion. The similarity of errors in medical aid rendered for acne as well as high percentage of errors relating to medical aid rendered to patients demand the development of consistent measures to improve the quality of medical aid rendered to such patients and repeated expert examination using preliminary (prompt) control of the quality of medical aid.

Lichen planus is among the most common chronic anogenital noninfectious dermatoses both in male and female. The disease is characterized by clinical polymorphism, frequent involvement of skin and oral mucosa and protracted course. Typical, hypertrophic and erosive forms are distinguished. Erosive variant is commonly encountered in women and has a prominent tendency for scarring. The most common anogenital form in men is the typical lichen planus, which usually resolves completely. Vulvovagino-gingival and penogingival lichen planus are rare severe disease forms. Evolutional and biological heterogeny of clinical manifestations complicates the disease diagnosis. Lichen planus pathogenesis remains unclear. Pronounced scarring tendency in anogenital cases is believed to be the consequence of epithelial-mesenchimal transition. High-quality clinical trials of various therapeutic modalities in anogenital lichen planus are lacking. Management of such patients is mostly based on case series reports, practical experience and general principles of dermatologic treatment. This review focuses on contemporary views on clinical presentation, pathogenesis, diagnosis and approach to therapy of anogenital lichen planus.