Is uterine fibroid a malignant tumor?
Jul 11, 2025
Source: Cainiu Health
Dr. Qi Zhirong
Introduction
Common uterine fibroids are composed of smooth muscle and connective tissue, grow slowly, and do not invade surrounding tissues or metastasize. Most patients do not experience noticeable symptoms and the condition is often discovered only during examinations. In such cases, these fibroids are classified as benign tumors, not malignant. In rare cases, uterine fibroids may undergo sarcomatous transformation, at which point the tumor cells exhibit malignant features and grow rapidly.
Generally, uterine fibroids are mostly benign tumors. Ordinary uterine fibroids can be determined as benign and are not malignant, while sarcomatous uterine fibroids cannot exclude malignancy. If concerned, it is recommended to seek medical advice in advance. Detailed analysis is as follows:
Common uterine fibroids consist of smooth muscle and connective tissue, grow slowly, do not invade surrounding tissues or metastasize, and most patients have no obvious symptoms, only being discovered during examinations. In such cases, they are considered benign tumors rather than malignant.
In rare cases, uterine fibroids can undergo sarcomatous changes. At this point, the tumor cells exhibit malignant characteristics, grow rapidly, may invade surrounding organs and metastasize, seriously threatening health. In such cases, they are classified as malignant tumors and require timely treatment.
When uterine fibroids are detected, regular follow-up examinations should be conducted to monitor changes in their size and shape. If there is a significant increase in size within a short period, further tests should be promptly performed to determine the nature of the fibroid and avoid delays in treatment.
