1.   She also had fibroids, which are benign tumors in the uterine muscle.

2.   Fibroids are formed from cells in the uterine muscle, while polyps are made of cells from the lining.

3.   Fibroid, a usually benign tumor of the uterus formed from cells of the uterine muscle.

4.   Fibroids grow from cells of the uterine muscle.