Fig. 4From: Evaluation of surgical outcomes and prognostic factors of second primary lung cancer based on a systematic review and meta-analysisForest plot of HR of OS for prognostic factors: A similarity and difference in histology between primary and second primary tumors; B tumor size of SPLC > 2 cm vs ≤ 2 cm; C solid-p vs GGO-p in CT morphology; D node positive vs node negativeBack to article page