A 28-year-old female patient has been admitted to the gynecology department for abdominal pain, spotting before and after menstruation for 5 days. The disease is associated with the abortion which she had 2 years ago. Anti-inflammatory treatment had no effect. Bimanual examination findings: the uterus is enlarged, tight, painful, smooth. Hysteroscopy reveals dark red holes in the fundus with dark blood coming out of them. What diagnosis can be made on the grounds of these clinical presentations?