What's the fibroadipose tissue of pancreas? If gastric cancer has invaded this tissue, does it mean it has invaded the pancreas? Is it curable?

Capsule of pancreas. The pancreas situated just behind the body of the stomach in the retroperitoneum does not have a real capsule like Gerotas fascia of kidney. When a stomach tumor invades posteriorly it reaches the anterior surface of the body of the pancreas. If this stomach tumor is completely removed and RT and chemo given there is a slight possibility of cure.