Objective: to determine the intensity of age-related dystrophic changes in different areas of iliolumbar, long dorsal sacroiliac ligament, and sacrotuberous ligaments. Materials. We have studied iliolumbar and long dorsal sacroiliac ligaments of 81 corpses: 39 men (the average age was 62.6 ± 8.8) and 20 women (the average age was 58.0 ± 11.8) and sacrotuberous ligaments of 15 male corpses (the average age was 69.2 ± 5.8) and 10 women (the average age was 57.8 ± 11.9). Results. We have revealed statistically significant differences between the parameters characterizing the intensity of dystrophic changes in the central and peripheral areas (i.e. in the areas adjacent to enthesitis) of iliolumbar, long dorsal sacroiliac and sacrotuberous ligaments. There was a strong relation between the age and intensity of dystrophic changes in various areas of iliolumbar, long dorsal sacroiliac, and sacrotuberous ligaments. Conclusion. Dystrophic changes in the iliolumbar, long dorsal sacroiliac and sacrotuberous ligaments develop unevenly in different parts (earlier and more pronounced changes appear in the areas adjacent to enthesis); age-related dystrophic changes of iliolumbar, long dorsal sacroiliac and sacrotuberous ligaments are closely linked, and therefore any changes that break this rule (for example, the emergence of asymmetrical expression or localization changes) are appropriate to consider as a potential pathological substrate of the lower back pain.