During this study 37 operational biopsies obtained from female patients, which underwent hysterectomia due to uterine leiomyoma (L) and/or adenomyosis (A) were investigated (groups: LA – 15 cases, L – 22 cases). Proliferation marker Ki-67 expression was determined in leiomyomas of different locations by immunohistochemical assay. It was found that proliferative activity in L depends on its location and correlates with tumor cellularity. The highest level of proliferative activity was observed in submucosal L. The level of proliferative activity in submucosal L was significantly higher in LA group, than in L of similar location in L group. Statistically significant reverse correlation between the proliferative activity level in L regardless of the location and time period from diagnosis to hysterectomia was found in LA group.
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