Uterine Fibroid Morphology and Histology with Respect to Reproductive Age.

Objective: To evaluate histological uterine fibroid incidence among reproductive age women and to deter- mine correlations between fibroid histological type, patient age, and number and size offibroids.

Study design: The study cohort consisted of 103 women desiring preg- nancy who underwent myo- mectomy for symptomatic uterine fibroids. The primary endpoints were histological type of fibroid, myomectomy incidence among 2 age groups (18-34 vs. 35-40), solitary or multiple fibroids, and <5 cm vs. >5 cm fibroid diameter. Secondary anal- ysis endpoints evaluated correlations between uterine fibroid histological type, 2 age groups of women,.and uterine fibroid number and size.

Results: Following myomectomy, 84.5% exhibited benign histology, and myomatosis malignancy was not detected. Of the 103 women, 50.5% were aged <34 and 49.5% were aged 35-40; 71.8% had a solitary fibroid and 28.2% had α 2 fibroids; 58.3% had a fibroid of <5 cm. and 41.7% had a fibroid >5 cm in diameter. Cellular fibroid incidence was higher (10.3%) in cases of multiple myomatosis in comparison to the solitary fibroid group (n=0) (p=0.021). Among women with multiple myomatosis (n=29), almost all (n=28, 96.6%) had only 1 histological type.

Conclusion: Among women of. child-bearing age having myomectomy, most have benign histology with no significant differences in histological type with regard to patient age and fibroid size. A higher incidence of cellular fibroids was observed only in multiple myomatosis cases.