Fig. 1
From: Diethylnitrosamine induces lung adenocarcinoma in FVB/N mouse
Histological analysis of primary, subcutaneous and spontaneous lung adenocarcinoma. (a-c) Primary tumor; (d-f) Subcutaneous tumor; (g-i) Spontaneous tumor, (a,d,g) Hematoxylin and eosin staining. Immunostaining of cytokeratin-7 (b,e,h) and TTF1 (c,f,i). Primary and subcutaneous tumors are from different animals. Scale bar = 50 μm