The growth of endometrial tissue inside the muscular wall of the uterine corpus. Clinical manifestations include pain, dysmenorrhea, and menorrhagia. The disease is adenomyosis (Monarch Disease Ontology id MONDO_0010888). Also known as: adenomyosis of the uterus, adenomyosis of uterus, endometriosis (disease) of myometrium, endometriosis interna, endometriosis of myometrium, endometriosis of uterus, endometriosis, myometrium, myometrium endometriosis (disease).