Adenomyoma is a tumor including components derived from gland

Gland

A gland is an organ in an animal's body that synthesizes a substance for release of substances such as hormones or breast milk, often into the bloodstream or into cavities inside the body or its outer surface .- Types :...

s ("adeno-") and muscle

Muscle

Muscle is a contractile tissue of animals and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to...

 ("-my-"). It is a type of complex and mixed tumor.

In Ob/Gyn contexts, it is a form of adenomyosis

Adenomyosis

Adenomyosis is a medical condition characterized by the presence of ectopic glandular tissue found in muscle. The term adenomyosis is derived from the terms adeno- , myo- , and -osis...

 that forms a mass or growth around the tissue of the inner uterus.

Usually occurs in women over 30 who have carried a pregnancy to term.
Conversely, it rarely occurs in women who have not carried to term.

Most cases of adenomyosis are non-symptomatic. However, it may present with dysmenorrhea

Dysmenorrhea

Dysmenorrhea is a gynecological medical condition of pain during menstruation that interferes with daily activities, as defined by ACOG and others. Still, dysmenorrhea is often defined simply as menstrual pain, or at least menstrual pain that is excessive...

 and pelvic pain

Pelvic pain

Pelvic pain is a symptom that can affect both women and men. The pelvic pain that persists for a period of 3 months or more to be considered chronic while less than this duration is considered acute. The pain may indicate the existence of poorly-understood conditions that likely represent abnormal...

. In case of juvenile cystic adenomyoma, laparoscopic enucleation results in a statistically and clinically significant reduction in dysmenorrhea, ease in any chronic pelvic pain and low risk of recurrence.