[Morphological findings in lymph nodes, spleen and liver in the rat following treatment with polyvinylpyrrolidone and trypan blue (light microscopy studies)].

Lymph nodes, spleen and liver from 36 rats were studied by light microscope following prolonged administration of PVP and TB. When PVP had been administrated, the invasion of all the organs by large foam cells of RES was apparent while the structure of the organs had been destroyed. The animals which had received PVP combined with TB had less reticuloendotheliosis of the organs while their structure was maintained to a greater extent.

Carcinoembryonic antigen detection by immunocytochemical methods in carcinomas of the colon and stomach.

CEA was studied in paraffin sections from 50 cases of colonic and 50 cases of gastric adenocarcinoma using immunoperoxidase and immunofluorescence techniques. CEA was positive more frequently in colonic (86 per cent) than in stomach carcinoma (76 per cent). Immunoperoxidase was found to be the more sensitive technique for the detection of CEA in both organs.