Figure 2: Staining of blood and lymphatic vessels with enzyme-histochemical staining for alkaline phoshatase (ALPase) and 5-Nase activity in the diaphragm. Arterial blood vessels are stained blue, and lymphatic vessels are stained brown. Ly:lymphatic vessel, BV: blood vessel, ☆:lymphatic valve (from a 45 years-old patient with gastric cancer, stage IV, poorly differentiated adenocarcinoma, and cytology of Class V).