Fig. 4

Histological hematoxylin and eosin (H & E) staining of the whole-mount zPDX model at 7 dpi. A low (a) and a higher (b) magnification of a representative zPDX were showed. Black box in (A) indicates the area of zoom. Arrows in (A) and yellow dashed line in (B) point to the adenoid structure formed by primary epithelial cells from GC patient. Dpi: days post injection