Distinct Structure of a Peduncular Submucosal Uterine Fibroid

Description

Bisecting the uterus in a sagittal section, the endometrial cavity is opened to reveal a peduncular submucosal uterine fibroid (leiomyoma) projecting into the lumen on a narrow stalk arising from the myometrium just deep to the endometrium. Superiorly, the uterine fundus continues laterally into the fallopian tubes toward the ovaries, while inferiorly the uterine body tapers to the cervix and the vaginal canal. The mass sits intracavitary, medial to the uterine walls, with the stalk marking its point of attachment. A pedunculated submucosal myoma is a common anatomic explanation for heavy menstrual bleeding and intermenstrual spotting because it distorts the endometrial surface and disrupts normal uterine contractility. Stalked intracavitary lesions also matter procedurally, since they are prime candidates for hysteroscopic myomectomy, and the relationship of the stalk to the endometrium and underlying myometrium helps frame the risk of incomplete resection, bleeding, or uterine perforation during instrumentation. Torsion or ischemic degeneration of the peduncle can convert a chronic bleeding complaint into acute pelvic pain. Small detail, big consequences. Use this illustration in gynecology teaching on FIGO submucosal fibroid types, in patient-facing counseling materials that explain why a myoma in the uterine cavity behaves differently than intramural disease, or in surgical atlases outlining hysteroscopic technique and cervical access to the uterine cavity. It also supports radiology-pathology correlation when discussing why intracavitary myomas can be missed or misclassified without careful cavity evaluation on saline infusion sonohysterography or MRI. Anatomical accuracy verified by SciePro's Medical Advisory Board.