There are different types of fibroids, a complete discussion of all the varieties in beyond this article. However this article will give you some insight into the classification, types and variations among fibroids.
There are many different classification system for fibroids. In general, however, there are 3 main types of fibroids:
1. Intramural Uterine Fibroids
Intramural uterine fibroids are located within the uterine wall and it’s the most common type of fibroid. When they grow, they can result in the uterus becoming enlarged. Their size is reference to the stages of pregnancy (no. of months) by doctors.
Most intramural fibroids do not cause symptoms until they reach a critical size. Fibroids that grow within the wall have limited space. Sooner or later their growth causes them to bulge in one of two directions—either into the uterine cavity or into the abdominal cavity.
They can result in:
- Pain in the pelvic area
- Lower back pain
- More than normal menstrual bleeding
- A sensation of pressure
Fibroids usually originate in the uterine wall, but often move, or migrate to other locations, which result in the following fibroid types:
2. Submucosal Uterine Fibroids
Submucosal fibroids, like Intramural fibroids, are located within the lining of the uterus, but protrude inward. Even the small ones which are no more than an inch in diameter can produce very heavy and prolonged menses.
The reason is that the superficial blood vessels that fibroids contain often rupture at the time of menses and the resulting bleeding can be severe enough to require hospitalization and even blood transfusions.
Aside from causing very heavy menses, submucous fibroids can be responsible for infertility and miscarriages. Even once pregnancy is established submucous fibroids can cause a woman to undergo premature labor.
The most common symptoms include:
- Exceptionally heavy bleeding
- Periods lasting a long time
- Anemia because of loss of blood during periods
3. Subserosal Uterine Fibroids
These fibroid types are within the uterine lining, but protrude outward. They usually have less of an effect on your menstrual cycle, and may go unnoticed. Like all fibroids they can vary in size. Because they grow into the abdominal cavity—where there’s a lot of room—they can achieve a very large size before they produce symptoms.
But depending on location, and size, they can cause the following symptoms:
- Back pain
- Bladder pressure
They can also grow on a stalk attached to the uterus, in which case it is called ‘pendunculated’. The stalk may become twisted and can cause severe pelvic pain.