Adenomyoma Of The Uterus Displayed In Sagittal Section

Description

Uterus in sagittal section reveals the endometrial cavity centrally, bounded by the myometrium and covered externally by the serosa, with the cervix continuous inferiorly toward the vaginal canal. A large, round adenomyoma occupies the muscular wall, expanding the myometrium and bulging toward the endometrial side more than the serosal surface. Its margins appear relatively well-circumscribed compared with diffuse adenomyosis, but it remains intramural, embedded between the inner (subendometrial) and outer myometrial layers. Orientation in a true sagittal cut helps relate the lesion to the fundus, corpus, and cervical canal in one frame. Adenomyoma matters because it sits at the intersection of benign uterine mass and endometrial invasion, often presenting with heavy menstrual bleeding, dysmenorrhea, and chronic pelvic pain, and it can confuse the workup for leiomyoma on ultrasound or MRI. The fixed sagittal perspective is the one clinicians mentally reconstruct when interpreting pelvic MRI, where adenomyoma typically shows ectopic endometrial glands and stroma within hypertrophic smooth muscle and may distort the junctional zone rather than creating the whorled appearance expected in fibroid. Differential diagnosis also includes focal adenomyosis and, less commonly, endometrial carcinoma with myometrial invasion, so the spatial relationship to the endometrium and depth within the myometrium are teaching points. Clear anatomic boundaries matter. Use this illustration in gynecology lectures on adenomyosis, in radiology teaching files that pair gross sectioning with MRI correlates, or in patient-education materials explaining why a presumed fibroid may behave differently clinically and surgically. It also supports surgical planning discussions for hysterectomy or adenomyomectomy by emphasizing intramural location relative to the endometrial cavity and serosa. Anatomical accuracy verified by SciePro's Medical Advisory Board.