Uterine fibroid

3 things to know first

1. Most fibroids are benign. The term does not mean uterine cancer.
2. Location matters. A fibroid near the uterine cavity may affect bleeding differently from one on the outside.
3. Many need no treatment. Size, symptoms, age, and pregnancy plans guide decisions.

What it is

A uterine fibroid, also called a leiomyoma or myoma, is a growth arising from the muscle of the uterus. Fibroids can be single or multiple and may grow within the wall, toward the uterine cavity, or outward from the surface. Their size and location vary widely.

Why it appears on your report

Pelvic ultrasound often identifies fibroids and describes their number, size, and location. MRI can show the anatomy in greater detail when the pattern is complex or treatment planning requires it. CT may reveal a fibroid incidentally but is usually not the main test for characterizing one.

How serious is it

A small fibroid may cause no symptoms. Others can be associated with heavy bleeding, pelvic pressure, pain, or fertility concerns. The scan cannot determine whether every symptom is caused by a fibroid. Your clinician will interpret the images with menstrual history, examination, and other findings.

When to seek care urgently

Seek prompt care for very heavy bleeding with dizziness or fainting, sudden severe pelvic pain, or symptoms during pregnancy that your maternity team has asked you to report.

What usually happens next

1. Review symptoms and the fibroid's size and position.
2. Discuss whether blood tests or follow-up imaging are needed.
3. Make an individualized plan with a gynecology professional if symptoms affect daily life.

A simple analogy

Imagine the uterus as a flexible wall. A fibroid is a usually benign knot in that wall; the effect depends partly on where the knot sits.

Further reading

• ACOG — Uterine Fibroids
• RadiologyInfo — Uterine Fibroids and Imaging