Fig. 1

Immunostaining of B7-H4 and Ki-67 in lung adenocarcinoma. a line, CT scan shows opacity with ground-glass in the right lung, HE staining confirmed lepidic predominant adenocarcinoma with high differentiation, IHC demonstrated a negative nuclei membranous B7-H4 and low Ki-67 staning. b line, CT scan shows pleural effusion in the right lung, HE staining confirmed MPA, IHC demonstrated a high nuclei membranous B7-H4 and strong Ki-67 staning, (red arrow, ×40). One representative data was showed