Figure 2.

Frequency of fetal microchimerism in melanoma occurring during pregnancy in pregnant women. The number of male fetal cells per section is noted, and the number of maternal cells per section is calculated by multiplying the mean nuclei counted per field with the number of fields in the section. The mean number of fetal cells per million maternal cells (black lines) was significantly higher in melanoma compared with the control patients (295 versus 2 per million maternal cells; P = 0.034). Each dot represents a patient.*P < 0.05 by Student’s t-test.