Sagittal Section Of A Uterus Showing Diffuse Adenomyomas

Description

Uterine wall anatomy is presented in sagittal section, with the endometrial cavity centrally bordered by a thickened myometrium and an external serosal contour. Scattered throughout the myometrium, diffuse adenomyomas appear as irregular islands of endometrial-type tissue embedded within smooth muscle, extending from the junctional zone toward the outer myometrial layers rather than forming a single circumscribed mass. The anterior and posterior uterine walls can be appreciated in profile, and the relationship of the fundus to the cervix is maintained in a single midline cut. No capsule is implied around the foci. Adenomyosis and diffuse adenomyoma formation matter because they correlate with heavy menstrual bleeding, progressive dysmenorrhea, and a globally enlarged, “boggy” uterus on bimanual examination. Gynecologic imaging often hinges on recognizing disruption and thickening of the junctional zone on MRI and ill-defined myometrial heterogeneity on ultrasound, and this sagittal profile helps learners translate those radiologic concepts into tissue-level anatomy. One fixed plane also makes the teaching point that adenomyotic glands and stroma sit within myometrium, not on the endometrial surface, which is why curettage may miss the diagnosis and why hysterectomy specimens often provide the definitive correlation. Use this illustration in pathology lectures on adenomyosis versus leiomyoma, in OB-GYN teaching on abnormal uterine bleeding and chronic pelvic pain, or in surgical education when discussing why focal excision can be challenging in diffuse disease. It also fits well in journal figures or patient-facing counseling materials that need a precise sagittal section to explain intramyometrial ectopic endometrium without implying malignancy. Anatomical accuracy verified by SciePro's Medical Advisory Board.