abnormal growth of the lining of the uterus outside the uterus is called
Adenomyosis Adenomyosis is a gynecologic medical condition characterized by the abnormal presence of endometrial tissue (the inner lining of the uterus) within the myometrium (the thick, muscular layer of the uterus).[1] In contrast, when endometrial tissue is present entirely outside the uterus, it represents a similar but distinct medical condition called endometriosis. The two conditions are found together in many cases,[2][3] but often occur independently. Before being recognized as its own condition, adenomyosis used to be called endometriosis interna. Additionally, the less-commonly used term "adenomyometritis" is a more specific name for the condition, specifying involvement of the uterus.[4][5]