Does pelvic cancer cause menstrual irregularity?

Patient's question:

In recent days, I have been feeling uncomfortable with bowel movements, and I've also been experiencing frequent urination and urgency. I haven't had the energy to eat, and my appetite is even worse. After being examined at the hospital, I was diagnosed with late-stage pelvic cancer. I would like to ask if pelvic cancer can cause menstrual irregularity?

Doctor's answer:

General ovarian cysts, even bilateral ovarian cysts, do not usually cause menstrual disorders because they do not destroy all normal ovarian tissue. Some uterine bleeding may not be due to endocrine disorders or changes in pelvic vascular distribution caused by ovarian tumors leading to endometrial congestion; or it may be due to direct metastasis of ovarian malignant tumors to the endometrium. Menstrual disorders caused by endocrine tumors are often accompanied by other secretory effects. Everyone should take good daily preventive measures for their health. If related symptoms appear, seek early treatment.

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