Proceedings of the International scientific and practical conference ―Current Issues in Science‖ (January 9-11, 2026) / Publisher website: www.naukainfo.com. – Dresden, Germany, 2026. – 179 p.

62 comorbidity of nail psoriasis and onychomycosis, with an emphasis on the clinical, diagnostic and organisational aspects of patient management. Literature sources were searched in the international scientometric databases PubMed/MEDLINE, Scopus and Web of Science. The analysis included publications published between 2019 and 2024, which corresponded to the current stage of development of diagnostic and therapeutic approaches to nail lesions in psoriasis. The inclusion criteria were publications that contained data on nail lesions in psoriasis; addressed the diagnosis and treatment of onychomycosis; analyses the combined course of nail psoriasis and fungal lesions; had a clearly described methodology and clinical focus; were presented in the form of systematic reviews, narrative reviews, consensus recommendations, or original studies. Publications that did not correspond to the topic of the study, contained outdated data, or did not provide sufficient information on diagnostic criteria were excluded from the analysis. Particular attention was paid to studies that used objective methods to confirm onychomycosis, in particular direct microscopy, culture testing, and molecular methods such as polymerase chain reaction (PCR). Publications that considered instrumental methods of assessing the nail apparatus – dermatoscopy, ultrasound examination of the nail, biopsy of the nail bed or matrix, as well as capillaroscopy – were analyzed separately in order to determine their role in the differential diagnosis of nail psoriasis and onychomycosis. Methods of analysis. We used methods of qualitative and comparative analysis of scientific sources with subsequent systematisation of the data obtained. Particular attention was paid to summarising the clinical aspects, diagnostic approaches and medical and social significance of the comorbidity of nail psoriasis and onychomycosis. The generalised results regarding the prevalence of onychomycosis in patients with nail psoriasis are presented in Table 1, and the main diagnostic approaches and their clinical possibilities are presented in Table 2.