All fibroids are not created equal.
Pedunculated means that it grows on a stalk. Like broccoli. The stalk can extend inside or outside the uterus.
Intramural means it grows smack dab in the middle of the uterine wall. If it pushes on the exterior wall you may feel pressure. If it grows toward the uterine cavity you’ll more likely to have more bleeding than pressure.
After all these things aren’t perfectly cylindrical so they grow and lean any which way they choose.
Lastly there are:
Subserous meaning outside the uterine wall.
And submucosal means inside the cavity.
It’s worth noting the types of fibroids there are because some have different symptoms than others.
Symptoms associated with pedunculated fibroid tumors include pain and pressure as the fibroids can sometimes twist on the stalk.
Large submucosal fibroid tumors may increase the size of the uterus cavity, and can block the fallopian tubes which can cause complications with fertility. Associated symptoms with submucosal fibroids include very heavy, excessive menstrual bleeding and prolonged menstruation.
The growth of a subserosal fibroid tumor will put additional pressure on the surrounding organs. Therefore, symptoms of subserosal fibroid tumors usually do not include abnormal or excessive menstrual bleeding or interfere with a women’s typical menstrual flow. These fibroid tumors instead cause pelvic pain and pressure.
When an intramural fibroid tumor expands, it tends to make the uterus feel larger than normal, which can sometimes be mistaken for pregnancy or weight gain. – Source
Also when choosing treatment knowing which sort you have, allows you to properly access whether you are eligible for a vaginal procedure or tackled laparoscopically. Or if ultimately you need a open myomectomy.
So again they can grow on a stalk inside the cavity (pedunculated) or grow right up on the wall of the uterine cavity (Submucosal). Inside the wall (intramural) Or they can grow outside of (yet touching) the uterus. (Subserosal)
Knowledge is power.