Figure 7b. Histologic sections (4 µm; with Azure II stain) show human breast adenocarcinoma cells (a) before and (b) after magnetic thermoablation. In contrast to findings in the nonheated tumor cells with normal nuclear morphology (a), substantial nuclear degeneration effects, such as chromatin margination along the nuclear envelope (arrows) and nuclear pyknosis (arrowheads), can be observed in the heated cells (b). In a and b, the horizontal line in the bottom right corner represents a length of 50 µm.