What Causes Uterine Enlargement?
May 06, 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 primarily involves hyperplastic cells in the uterine tissue. Common etiologies include:
1. Uterine factors
Chronic uterine involution failure in multiparous women: In multiparous women, elastic fiber tissue within the myometrium proliferates between smooth muscle fibers and around blood vessels, leading to uterine hypertrophy. Additionally, ovarian dysfunction—characterized by persistent estrogenic stimulation—may cause myometrial thickening. Clinically, patients with dysfunctional uterine bleeding, particularly those with prolonged disease duration, often exhibit varying degrees of uterine enlargement.
2. Inflammatory factors
Chronic adnexitis, chronic pelvic connective tissue inflammation, and chronic endomyometritis can induce collagen fiber proliferation within the myometrium, resulting in uterine fibrosis. Furthermore, long-standing chronic inflammation causes cervical hyperemia and edema, along with hyperplasia of cervical glands and stroma, leading to varying degrees of cervical hypertrophy. Pelvic venous congestion may also trigger hyperplasia of uterine connective tissue, contributing to uterine hypertrophy.
