I've thickened posterior myometrium. 2 ill-defined, hypoechoic areas in the posterior myometrium measuring 2 x 1.5 CM and 1.9 x 1.6 cm. Meaning what?

Fibroids. These sound like small fibroids. What did your physician say. The person who actually saw the images has the best possible opportunity for an accurate diagnosis. Make sure to follow up with your doctor so that you can be fully informed about your diagnosis.