The pathology of dysfunctional uterine bleeding

Area of Science:

• Reproductive Medicine
• Gynecology
• Pathophysiology

Background:

• The precise mechanisms underlying dysfunctional uterine bleeding (DUB) are not fully understood.
• Current research indicates that local endometrial or myometrial dysfunction plays a significant role in most DUB cases.
• Key factors implicated include altered prostaglandin production and increased endometrial fibrinolytic activity.

Purpose of the Study:

• To explore the underlying causes of dysfunctional uterine bleeding.
• To investigate the roles of prostaglandins and fibrinolysis in pathological menstruation.
• To identify areas for future research to improve DUB treatment.

Main Methods:

• Review of recent studies on dysfunctional uterine bleeding.
• Analysis of the involvement of prostaglandins (PGE2, PGF2 alpha, prostacyclin, thromboxane) and fibrinolysis.
• Evaluation of treatment outcomes with prostaglandin synthetase inhibitors and fibrinolytic inhibitors.

Main Results:

• Prostaglandins and fibrinolytic activity in the endometrium are implicated in DUB.
• Effective treatment of excessive menstrual bleeding with mefenamic acid (prostaglandin inhibitor) and epsilon amino caproic acid/tranexamic acid (fibrinolytic inhibitors) supports these findings.
• The role of uterine mast cells and heparin-like activity in menstrual bleeding requires further investigation.

Conclusions:

• Dysfunctional uterine bleeding likely stems from local endometrial and myometrial dysfunction.
• Prostaglandins and fibrinolysis are critical factors in the pathophysiology of DUB.
• Further research is essential to elucidate remaining questions and develop specific treatments for normal menstrual function.