Undifferentiated connective tissue dysplasia (UCTD) is a genetically determined condition with a progressive course characterized by defects in the fibrous structures and the basic connective tissue substance, leading to impaired formation of organs and systems, which determines the features of the associated pathology, as well as the pharmacokinetics and pharmacodynamics of drugs. In dermatological and cosmetological practice, the issue of UCTD is very topical, as individual external presentations of the connective tissue dysmorphogenesis among young people can reach 85.4%. In recent decades, a real revolution has taken place in aesthetic medicine, which is associated with the emergence of new injectable products, development of hardware, cellular and thread techniques. Every year mew methods of treatment emerge and the existing ones are improved. Statistics of the past years show that minimally invasive non-surgical interventions are becoming more and more popular in all countries, their number significantly exceeds the number of surgical operations. To date, there are 2 groups of methods aimed at collagen stimulation: hardware techniques and injection methods. The effectiveness of the use of polylactic acid drugs as the first-line drugs for the correction of UCTD in order to prevent premature ageing was evaluated in the presented clinical cases. Patients with a cosmetology profile were treated according to the complex protocols that included amino acid replacement therapy, IV therapy, contour correction with drugs containing polylactic acid and hardware techniques (microneedle RF lifting with insulated and non-insulated needles, ultrasonic SMAS lifting, ablative laser techniques, Ipl-therapy). As a result, an algorithm for managing a patient with UCTD was developed in the cosmetology practice. The provided clinical cases show that the detection of signs of UCTD can significantly improve the patient’s quality of life and prevent premature aging.

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