<P> 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 ) . 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 , 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 . </P>
<P> 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 ) . 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 , 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 . </P>
abnormal growth of the lining of the uterus outside the uterus is called
abnormal growth of the lining of the uterus outside the uterus is called
endometriosis
endometriosis