How large can a fibroid grow?

Dr. John C. Lipman, MD
Vascular & Interventional Radiologist

Uterine fibroids are benign (non-cancerous) tumors that are composed of smooth muscle and fibrous tissue. They are the most common pelvic tumor in women and affect 1 in every 3 women of childbearing age and as many as 80 percent of African-American women. These tumors can vary greatly in size and grow under estrogen and progesterone stimulation which explains why they often grow during pregnancy and why they are often not an issue once a woman reaches menopause. Fibroids can be tiny as a pea or they can grow to a very large size and can enlarge a woman's uterus to that of a pregnant woman. On rare occasions a fibroid can grow to an enormous size weighing as much as 50 lbs. One case report of a fibroid weighed in at 140 lbs.

Dr. Mehmet Oz, MD
Cardiologist (Heart Specialist)
The noncancerous growths called uterine fibroids sometimes grow as large as a cantaloupe. Watch the animation to learn more about fibroids.


Continue Learning about Uterine Fibroids

Uterine Fibroids

If you have uterine fibroids, you may never even notice that they are there. Ranging from the size of a small seed to grapefruit-sized, fibroids are tumors on the uterus that rarely cause harm. Some women have true discomfort with ...

fibroids, including pain in the abdomen or low back, or pain during sex. Sometimes, uterine fibroids can cause miscarriage, preterm labor, or even lead to infertility. Women in their 40s and 50s, women of African-American descent and women that are overweight are at higher risk of developing fibroids, although an estimated 20-80% of women will have them at some point before they turn 50. If your doctor notices fibroids during an ultrasound or pelvic exam, he or she may want to treat them with medication or surgery.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.