bronchial margin
The cut edge of bronchus examined pathologically to ensure complete tumor removal. Critical for determining adequacy of resection.
Full Definition
The surgical margin at the site where the bronchus is divided during lung resection procedures, which is examined histologically to determine whether tumor cells are present at the resection edge. A negative (clear) bronchial margin indicates that no malignant cells are found at the cut surface, suggesting complete removal of the tumor. A positive bronchial margin indicates residual tumor cells and may necessitate further resection or additional treatment. Bronchial margin status is a critical prognostic factor and influences decisions about adjuvant therapy. Surgeons may send frozen sections during the procedure to assess margin status and guide the extent of resection needed.
Usage
Usage note: Critical to distinguish from other types of surgical margins in thoracic surgery.
In Context
- "Frozen section confirmed a negative bronchial margin at the lobar bronchus." — Intraoperative consultation
- "The final pathology showed a positive bronchial margin requiring additional treatment." — Pathology report