What Causes Uterine Enlargement?
Jul 05, 2022
Source: Cainiu Health
Dr. Wang Lianlian
Introduction
Causes of uterine hypertrophy:
- Uterine factors: Chronic incomplete uterine involution in multiparous women. In multiparous women, elastic fiber tissue within the myometrium proliferates among smooth muscle fibers and around blood vessels, leading to uterine hypertrophy.
- Inflammatory factors: Chronic inflammation induces uterine fibrosis. Prolonged inflammatory stimulation causes cervical hyperemia and edema, as well as hyperplasia of cervical glands and stroma, resulting in varying degrees of cervical hypertrophy.
Uterine hypertrophy is a common gynecological condition in women—and a serious one—classified as a form of chronic cervicitis. Typical manifestations include uterine enlargement (1–2 times normal size) or cervical erosion. Uterine hypertrophy primarily involves hyperplastic cellular changes in the uterine tissue. Common etiologies are as follows:
1. Uterine factors
Chronic uterine involution failure in multiparous women leads to hypertrophy. In such women, elastic fiber tissue within the myometrium proliferates among smooth muscle fibers and around blood vessels, resulting in uterine enlargement. Additionally, ovarian dysfunction may contribute: persistent estrogen stimulation causes myometrial thickening. Clinically, patients with dysfunctional uterine bleeding—especially those with prolonged disease duration—commonly exhibit varying degrees of uterine enlargement.
2. Inflammatory factors
Chronic adnexitis, pelvic connective tissue inflammation, and chronic myometritis induce collagen fiber proliferation within the myometrium, leading to uterine fibrosis. Moreover, long-standing chronic inflammation causes cervical hyperemia and edema, stimulating hyperplasia of cervical glands and stroma, thereby resulting in varying degrees of cervical hypertrophy. Pelvic venous congestion may also trigger connective tissue proliferation in the uterus, contributing to uterine hypertrophy.
