Focal Adenomyoma Exposed In A Sagittal Section Of The Uterus

Description

Uterine corpus anatomy is presented in a mid-sagittal section, with the endometrial cavity and cervical canal aligned along the long axis of the uterus. A focal adenomyoma forms a circumscribed, intramural mass within the myometrium, centered deep to the endometrium rather than projecting into the cavity. Surrounding myometrium appears thickened, and the serosal contour remains intact along the anterior and posterior uterine walls. Orientation in sagittal plane makes the relationship of the lesion to the fundus, isthmus, and endocervix easy to read in a single frame. Focal adenomyoma sits on the adenomyosis spectrum and often enters the differential diagnosis with leiomyoma when patients present with heavy menstrual bleeding, dysmenorrhea, chronic pelvic pain, or infertility. The teaching point is the interface: adenomyoma typically blends with adjacent myometrium and may distort the junctional zone, whereas a classic fibroid is more sharply demarcated and commonly shows a pseudocapsule, a distinction that affects preoperative counseling and the likelihood of persistent symptoms after limited excision. This sagittal section also supports correlation with pelvic MRI, where ill-defined margins and small ectopic endometrial glands within the myometrium explain the heterogeneous appearance and pain pattern. A common pitfall is mislabeling an intramural adenomyoma as a submucosal mass based only on cavity distortion. Use this illustration in gynecologic pathology lectures, reproductive endocrinology teaching on adenomyosis-related infertility, and surgical planning discussions that compare adenomyomectomy with hysterectomy for refractory bleeding and pain. It also fits medical textbook figures on uterine wall layers and mass localization in sagittal section. Anatomical accuracy verified by SciePro's Medical Advisory Board.