parametrium
Pronunciation: pair-ah-MEE-tree-um
The connective tissue and smooth muscle surrounding the cervix and upper vagina, extending laterally to the pelvic sidewall.
Full Definition
The parametrium is the fibrous and muscular connective tissue that surrounds the cervix and upper portion of the vagina, extending laterally toward the pelvic sidewall. This tissue contains important structures including the uterine vessels, cardinal ligaments, and portions of the autonomic nerve supply to the pelvis. Understanding parametrial anatomy is crucial for radical hysterectomy procedures, as this tissue must be resected in cases of cervical cancer to achieve adequate surgical margins. The parametrium is divided into medial, central, and lateral portions, each with distinct anatomical relationships and surgical considerations.
Usage
Usage note: Plural form is 'parametria'; important in oncologic surgery documentation.
In Context
- "Radical hysterectomy requires complete resection of the parametrial tissue to achieve oncologic margins." — oncologic surgery guidelines
- "Frozen section confirmed negative parametrial margins during the radical procedure." — intraoperative pathology report