A heterogeneous myometrium means that the muscular layer of the uterus has an uneven or irregular appearance on an ultrasound. This finding is not a diagnosis on its own, but it may be associated with conditions such as adenomyosis or uterine fibroids.
The myometrium is the thick, muscular middle layer of the uterus, located between the endometrium (inner lining) and the perimetrium (outer layer). In adenomyosis, tissue similar to the uterine lining grows into the myometrium, which can cause the uterus to become enlarged and appear irregular on an ultrasound. Fibroids, on the other hand, are benign growths made of muscle and fibrous tissue that often appear as well-defined masses.
In cases of adenomyosis, an ultrasound may also reveal small cysts within the myometrium, along with bright lines or spots just beneath the endometrium. These findings can help suggest the diagnosis.
It is important to consult a gynecologist to determine the cause, especially if you experience symptoms such as heavy menstrual bleeding, severe menstrual cramps, or pelvic pain. Additional imaging tests, such as an MRI, may be recommended to clarify the diagnosis. However, treatment may not be necessary if you have no symptoms.