Uterine fibroid location classification

Uterine fibroids are a relatively common gynecological disease and a common tumor. They are also called uterine fibroids. Most uterine fibroids are benign tumors. Depending on their location in the uterus, they can be divided into many types. The more common ones are intramural fibroids, subserosal fibroids, etc. If uterine fibroids occur, they should be examined promptly and treated promptly. Let’s take a look at this aspect.

Uterine fibroid location classification

According to the different parts of the uterus where the fibroids are located, they are divided into the following categories:

1. Intramural fibroids: Fibroids are located within the muscle wall and are surrounded by muscle layers. This type of fibroid is the most common fibroid when the disease first occurs, so it accounts for about 60-70%.

2. Subserosal fibroids Intramural fibroids develop towards the serosa and protrude from the surface of the uterus, in direct contact with the serosa layer, accounting for about 20%. If it grows between the two leaves of the broad ligament, it is called an intra-broad ligament myoma.

3. Submucosal fibroids: Intramural fibroids grow into the uterine cavity, protrude into the uterine cavity, and are in direct contact with the mucosal layer, accounting for about 10%-15%. This tumor can cause the uterine cavity to gradually enlarge and deform, and is often connected to the uterus by a pedicle. If the pedicle is long, it can block the cervical opening or prolapse into the vagina.

4. Cervical fibroids are rare. Fibroids grow in the cervix of the uterus. Due to their low growth location, they can become embedded in the pelvic cavity, causing compression symptoms. Surgical removal is difficult and can easily damage the ureter and bladder. Uterine fibroids are often multiple, and the above different types of fibroids can occur simultaneously in the same uterus, which is called multiple uterine fibroids.

Causes

The cause of uterine fibroids is still not very clear, and may involve a more complex interaction between normal muscle layer cell mutations, sex hormones and local growth factors.

A large number of clinical observations and experimental results indicate that uterine fibroids are a hormone-dependent tumor. Estrogen is the main factor that promotes the growth of fibroids. Some scholars also believe that growth hormone (GH) is also related to the growth of fibroids. GH can cooperate with estrogen to promote mitosis and promote the growth of fibroids. It is speculated that human placental lactogen (HPL) can also cooperate with estrogen to promote mitosis. It is believed that the accelerated growth of uterine fibroids during pregnancy is related to the high hormone environment during pregnancy, and HPL may also play a role.

In addition, ovarian function and hormone metabolism are controlled and regulated by higher nerve centers, so the activity of nerve centers may also play an important role in the occurrence of fibroids. Uterine fibroids are more common in women of childbearing age, widows, and those with disharmonious sexual lives. Chronic pelvic congestion caused by long-term sexual dysfunction may also be one of the causes of uterine fibroids.

In short, the occurrence and development of uterine fibroids may be the result of the combined action of multiple factors.