From: The prevalence of occult leiomyosarcoma at surgery for presumed uterine fibroids: a meta-analysis
 | Randomized controlled studies | Prospective studies | Restrospective studies |
---|---|---|---|
# of patients | |||
 >100 patients | 5 | 8 | 44 |
 25–99 patients | 15 | 19 | 19 |
 <25 patients | 6 | 11 | 7 |
Type of surgery | |||
 Myomectomy | 12 | 23 | 25 |
 Hysterectomy | 13 | 11 | 33 |
 Both | 1 | 3 | 12 |
 Unknown |  | 1 |  |