Growth Pattern of an Intramural Uterine Fibroid

Description

Centered in the pelvis, the uterus is rendered with the cervix inferiorly continuous with the vaginal canal, while the uterine fundus lies superior to the cervical canal and between the bilateral uterine (fallopian) tubes. An intramural uterine fibroid (leiomyoma) occupies the myometrium, expanding within the muscular wall between the endometrium medially and the serosal surface laterally, so its growth produces outward bulging of the contour and inward indentation toward the uterine cavity. Laterally, the adnexa are included for orientation: each tube sweeps posterolaterally toward the fimbriae adjacent to the ovary, with the uterine cornua marking the junction of cavity and tube. Intramural fibroids matter because they enlarge where uterine contractility and uterine artery branches traverse, so even without a submucosal component they can drive heavy menstrual bleeding, dysmenorrhea, and pelvic pressure. Cavity distortion from an enlarging intramural myoma is a common anatomic explanation for infertility, recurrent pregnancy loss, and pregnancy complications such as malpresentation and postpartum hemorrhage, and it is the key distinction used when planning hysteroscopic resection versus laparoscopic or open myomectomy. Size and location dictate symptoms. Relationships are the story. Gynecology lecturers and authors can use this image to teach the FIGO concept of fibroid location (intramural versus submucosal and subserosal), and to explain why saline infusion sonohysterography or MRI is often ordered when a patient’s bleeding pattern and exam suggest myoma-driven cavity distortion. Medical publishers will also find it suitable for patient-facing counseling materials that compare uterine-sparing options (myomectomy, uterine artery embolization) with hysterectomy in reproductive-age women. Anatomical accuracy verified by SciePro's Medical Advisory Board.