Would you offer chemotherapy in stage IB (T2aN0) lung adenocarcinoma after segmentectomy, if visually pleura appeared to be involved per the surgeon but negative on pathology?

If final pathology is negative for visceral pleural involvement, this tumor is between 3 and 4 cm, which is rather large for segmentectomy only and is at higher risk for locoregional recurrence. Additional information regarding adenocarcinoma subtype, such as solid or micropapillary type, can also c...