Abstract
Light transmission at 410, 630 and 670 nm in the liver tissue was determined with models of the various liver diseases of rats and resected specimens of liver of 8 patients, who had primary hepatoma with hepatic cirrhosis in 4 cases and metastatic liver tumor without cirrhosis in 4. Penetration depth of the tumor tissues in three wavelengths was significantly longer than those of the liver tissues with normal, hepatitis or cirrhosis in rats. In the human liver, light penetrated deeply in the order of metastatic tumor., hepatoma, cirrhosis and normal liver. Examination of transmission in the various tissues may have potentiality in diagnosis and treatment for tumors in the liver.
