A hypoechoic nodule in the posterior wall of the uterus is likely to be a small fibroid in clinical practice and can be left untreated if there are no symptoms. Because about 30% of women clinically have fibroids, when they are relatively small and asymptomatic, they can be given regular review. The main purpose is to find out how fast the fibroids are growing and whether they have degenerated. Since most fibroids are benign tumors, if there is no degeneration and there are no clinical symptoms, regular review is sufficient. If the fibroid is larger than five centimeters in diameter, surgery is required. In addition, if the submucosal fibroids are not larger than five centimeters in diameter but cause significant clinical symptoms, surgery is required.