Adenomyosis is quite a common disease of female gynecological sphere. Its frequency goes up to 60-70%. In most of the cases it is diagnosed in women after 30. It is a pathological state of the uterine endometrium when the endometrial cells grow into the muscle wall of the uterus. The muscle fibers around these ingrown cells are getting thicker. The entire uterus increases in size. Sometimes the ingrown endometrium even forms hotbeds in the uterine wall, sometimes it forms bundles. They look very similar to the myoma bundles. This is the reason that often they are difficult to diagnose during the ultrasound exam. However, they often go combined.