No abstract

We compared proliferative activity and levels of steroid receptors in the myometrium and myoma nodes in patients with uterine myoma in different phases of menstrual cycle. Maximum proliferative activity was observed at the periphery of myoma nodes in the the secretory phase of the cycle. The content of progesterone receptors at the periphery and in the center of myoma nodes was lower in the proliferative phase of the cycle than in the secretory phase. Steroid regulation of proliferative activity in the myoma nodes in the the secretory phase through modulation of the content of progesterone receptors is hypothesized.

No abstract

Comparative analysis of the density of microvessels and angiogenic activity in eutopic endometrium during different phases of the menstrual cycle in patients with peritoneal endometriosis showed that peritoneal form of endometriosis is a paracrine disease with dysregulation of angiogenesis processes in the eutopic endometrium. Excessive angiogenesis in this condition promotes implantation of eutopic endometrium on the peritoneum. Angiogenesis in eutopic endometrium can be maintained due to high concentrations of vascular endothelial growth factor A in the peritoneal fluid.