Relevance: Hereditary connective tissue disorders (HCTDs) are a heterogeneous group of diseases caused by mutations in the genes of extracellular matrix proteins or proteins involved in connective tissue morphogenesis. Mutations of these genes lead to the development of many HCTDs. The best known monogenic variants of HCTDs are Marfan syndrome, Ehlers-Danlos syndrome, and osteogenesis imperfecta. Inheritance is mainly autosomal, dominant or recessive. Although the first signs of HCTDs develop as early as the first year of life, it takes several years for pediatricians and specialty physicians to make the diagnosis of connective tissue dysplasia because of a lack of clear methodological approach. The disease is multi-morbid and may manifest under gastroenterological, cardiological, nephrological, or respiratory masks.Aim: to present a clinical case of Ehlers-Danlos syndrome with multiorgan digestive, heart, kidneys, and other lesions.Material and methods: the case history is presented of a 15‑year-old boy with Ehlers-Danlos syndrome, classic type.Discussion: defective collagen increased the connective tissue extensibility affecting function of many body organs and systems, including gastrointestinal, biliary, and urinary tracts, musculoskeletal and cardiovascular systems. Small developmental anomalies led to functional (motor) disorders, which contributed to the chronic organic pathology (erosive reflux esophagitis, gastroduodenitis, cholelithiasis, proctosigmoiditis, chronic pyelonephritis, or chronic sinusitis). Given the multi-organ character of the lesions, the progredient course of bone and joint changes, and early development of disability, the prognosis for the health of this child is serious. A multidisciplinary approach is important to plan the follow-up (with orthopedist, gastroenterologist, cardiologist, ophthalmologist, and nephrologist). Timely rehabilitation, therapeutic physical training courses, massage, metabolic, and anti-relapse treatment are necessary to slow down the progredient course of the hereditary connective tissue disease.
REGULARITIES OF STRUCTURAL-CELLULAR STRUCTURE OF OVARIES IN ONTOGENESIS