Serial observations on an orthotopic gastric cancer model constructed using improved implantation technique

Table 1 Macroscopic observation on SGC-7901 gastric cancer model at different time points

Items	2 wk	4 wk	6 wk	8 wk	10 wk/12 wk
Primary tumor
Shape	Oval	Oval	Globular	Irregularly lobular	Irregularly lobular
Color	Gray-white	Gray-white	Gray-white	Grayish yellow	Grayish yellow
Texture	Stiff	Stiff	Stiff	Stiff	Stiff
Vascularity	Sparse	Sparse	Rich	Richer	Richer
Section of stomach tumor
Gastric cavity	No change	Mildly stenosis	Obvious stenosis	Obvious stenosis	Narrow or vanished
Greater and lesser curvature	Distinguishable	Distinguishable	Distinguishable	Distinguishable	Undistinguishable
Pylorochesis	No	No	Partly	Partly	Totally
Effects on adjacent organs
Abdominal cavity	No effects	No effects	No effects	Occupying upper abdomen	Occupying whole abdomen
Adhering extent	Adhering to liver lobes	Adhering to liver lobes	Adhering to liver lobes	Adhering to liver lobes or posterior abdominal wall	Adhering to liver lobes or posterior abdominal wall
Compressed status	No compression	No compression	No compression	Partly oppressed	Partly oppressed
Ascites
Liquid quantity	Zero	Zero	Zero	Little	Little
Property	-	-	-	Clear and yellowish	Clear and yellowish
Metastasis
Lymph nodes	No	No	Yes	Yes	Yes
Other organs	No	Yes	Yes	Yes	Yes