What is adenomyosis

Uterus: Adenomyosis refers to a disorder in which endometrial glands and stroma are present within the musculature of the uterus. The ectopic endometrial tissue induces hypertrophy and hyperplasia of the surrounding muscle tissue, resulting in a globular enlargement of the uterus. The most common symptoms are heavy menstrual bleeding and painful menses. Chronic pelvic pain can occur.

Uterine thickening: The general term means that there is the abnormal presence of glandular tissue in muscle. Most often, this term is used by doctors when referring to a condition specific to women who have uterine thickening. Here's a helpful link: http://www.Ncbi.Nlm.Nih.Gov/pubmedhealth/pmh0002481/.