A 35-year-old woman complained of lower abdominal pain, which worsened over time menstruation and sexual intercourse and irradiate into the vagina, smearing bloody discharge before and after menstruation for 5 days. Infertility for 9 years. Anti-inflammatory treatment effect did not give. During the bimanual examination revealed: the uterus is enlarged, dense, painful, smooth. During hysteroscopy in the area of the bottom of the uterus you can see dark red formations, of which dark blood is released. Which diagnosis corresponds to this clinical picture?