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Table 1 The studies: number of patients and type of surgery

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