What are the reasons for irregular menstruation that is always delayed?

Patient's question:

Irregular menstruation, this is the ultrasound image, haven't had a period for 3 months, doctor this is the report image

Doctor's answer:

Based on your description of the specific situation, it is inferred that there should be a mixed mass in the right. It has not been menstruating for the past three months, and the likelihood of the mass is relatively high. It has already shrunk below eight centimeters. It is recommended to have surgery as soon as possible. The recurrence of gynecological diseases poses a serious threat to women's health. The patient needs to pay attention to treatment during daily life and avoid sexual activity. Additionally, personal hygiene should be taken care of. Finally, it is hoped that the female patient can receive effective treatment.