Fig. 1

Human lung adenocarcinoma is infiltrated by nerve fibers. (A) Chest CT scan of LUAD patient A with solid tumor size as 1.8 cm. (B-C) PGP 9.5 staining in patient A with negative control. (D) Chest CT scan of LUAD patient B with solid tumor size as 3 cm. (E-F) PGP 9.5 staining in patient B with negative control. (G) Semiquantitative results of IHC staining. Unpaired Student’s t test. n = 7 in T ≤ 2 cm group and n = 8 in T >2 cm group. Scale bar: 200 μm. *P < 0.05