Fig. 2

a Cancerous pericarditis: the parietal pericardium and visceral pericardium adhered to each other (arrow heads) and exhibited tumor infiltration (arrow). b Hematoxylin and eosin-stained pericardial tissue. A large number of tumor cells infiltrated the pericardium. Tumor cells infiltrated the lymph vessels of the myocardium (× 20). c Hematoxylin and eosin-stained pericardial tissue. A large number of tumor cells infiltrated the myocardium (× 20). d Immunostained (D2–40) pericardial tissue. Findings of pericardial lymphatic invasion and lymphatic metastasis (× 100)