Figure 3.

Increased frequency of metastatic tumor cells to PLN and MLN in LTZ mice. Different organs were sectioned and incubated with X-gal and examined under the microscope for detection of β-gal⁺ cells. A total of 70 LTZ mice, 30 ZT mice, and 30 LZ mice were examined. The percent metastases represents the number of mice in which blue-colored β-gal⁺ tumor cells were found in the indicated organ divided by the total number of mice examined.