Sublobar resection for lung cancer

Area of Science:

• Thoracic Surgery
• Surgical Oncology
• Pulmonary Medicine

Background:

• Sublobar resection for small lung cancers remains controversial.
• A key randomized trial showed higher recurrence but similar survival for sublobar resections versus lobectomy.

Purpose of the Study:

• To evaluate the efficacy and safety of sublobar resection versus lobectomy for small lung cancers.
• To analyze recurrence rates and survival outcomes based on resection type and tumor characteristics.

Main Methods:

• Review of randomized trials, meta-analyses, and non-randomized comparative studies.
• Analysis of survival rates and local recurrence based on surgical technique (lobectomy, segmentectomy, wedge resection) and tumor size.

Main Results:

• Lobectomy demonstrated a trend towards better survival and significantly lower recurrence rates compared to sublobar resections.
• Segmentectomy showed equivalent survival to lobectomy for tumors ≤2 cm, but worse outcomes for larger tumors.
• Wedge resection had higher local recurrence than segmentectomy, but similar survival to lobectomy in elderly patients (>71 yrs).
• Tumor margins ≥1 cm are crucial for both segmentectomy and wedge resection to prevent recurrence.
• For pure bronchioloalveolar carcinoma ≤2 cm, sublobar resection may be equivalent to lobectomy, potentially avoiding nodal dissection if diagnosed definitively intraoperatively.

Conclusions:

• Sublobar resection can be considered for specific small lung cancer cases, particularly tumors ≤2 cm or pure bronchioloalveolar carcinoma, with adequate margins.
• Lobectomy with systematic nodal dissection remains the standard for ensuring complete resection and accurate staging, especially in cases of doubt.
• Further randomized trials are necessary to definitively establish the role of sublobar resection in lung cancer treatment.