Uterus With Diffuse Adenomyosis, Sagittal Section

Description

Uterus in mid-sagittal section exposes the endometrial cavity, cervix, and full thickness of the uterine wall from endometrium to serosa. Diffuse adenomyosis appears as multiple thickened, ill-defined nodules and trabeculated foci scattered through the myometrium, extending from the inner myometrium adjacent to the endometrial-myometrial junction toward the outer wall. The ectopic endometrial islands sit within hypertrophied smooth muscle, so the myometrial architecture looks expanded rather than circumscribed. Anterior and posterior myometrial walls can be compared directly in this fixed plane, with the uterine fundus superior and the cervical canal inferior. Diffuse adenomyosis matters because it is a common substrate for heavy menstrual bleeding, dysmenorrhea, chronic pelvic pain, and subfertility, and it often coexists with leiomyomas and endometriosis. The sagittal cut emphasizes the disrupted junctional zone and the way adenomyotic foci blend into surrounding muscle, a key distinction from a well-circumscribed leiomyoma with a pseudocapsule. Expect to reference this morphology when correlating with MRI findings (thickened junctional zone, punctate high-signal foci) or when explaining why endometrial ablation may fail if disease extends deep into the myometrium. Diagnosis can be missed. Use this illustration in gynecology teaching on abnormal uterine bleeding, in pathology or radiology modules contrasting adenomyosis with fibroids, and in surgical counseling materials discussing hysterectomy versus uterus-sparing options such as LNG-IUS or adenomyomectomy in selected patients. It also fits well in reproductive endocrinology discussions of implantation failure and distorted myometrial peristalsis as a proposed mechanism. Anatomical accuracy verified by SciePro's Medical Advisory Board.