Comparing Needle and Surgical Biopsy in Small Peripheral Non-Small Cell Lung Cancer With Suspected Pleural Invasion: A Propensity Score-Matched Study.

Background: This study aimed to compare long-term clinical outcomes of percutaneous needle biopsy (PCNB) versus surgical biopsy in patients with peripheral, small-sized clinical stage 1 non-small cell lung cancer (NSCLC) with computed tomography (CT)-defined visceral pleural invasion (VPI).

Methods: We retrospectively analyzed patients who underwent surgery for NSCLC with CT-defined VPI between 2010 and 2017. We excluded patients with non-peripheral NSCLC, or cancers > 3 cm. Propensity score matching was carried out to adjust for confounding variables. The primary endpoint was ipsilateral pleural recurrence-free survival, while secondary endpoints included overall survival and recurrence-free survival.

Results: Of the 1671 patients with peripheral, small-sized clinical stage 1 NSCLC with CT-defined VPI, 805 underwent PCNB, and 866 had a surgical biopsy. Propensity score matching assigned 562 patients to each group. Before matching, the PCNB group demonstrated worse baseline characteristics, including older age, higher smoking history, and more adverse pathological findings. After matching, the 5-year recurrence-free survival for ipsilateral pleural recurrence (98.6% vs. 96.0%, p = 0.002) and overall survival (93.8% vs. 90.2%, p = 0.003) were significantly higher in the surgical biopsy group compared with the PCNB group. Multivariable analysis revealed that PCNB significantly increased the risks of all-cause mortality and various recurrences before and after matching.

Conclusions: Compared with surgery biopsy, PCNB was associated with higher risks of all-cause mortality and recurrences, including ipsilateral pleural recurrence. PCNB should be considered with caution in cases of peripheral stage 1 NSCLC where CT-defined VPI is suspected.