Morphology of myocardium.

<p>Semithin cross-sections (1 µm thickness) stained with toluidine blue did not show any differences in the dimensions of cardiomyocytes between control (A) and tumor-bearing mice (B). However, the subcellular organization of cardiomyocytes appeared less dense in the tumor group. Paraffin longitudinal sections (5–7 µm thickness) stained with Masson-Goldner's trichrome did not provide evidence for an enhanced collagen deposition in the tumor-bearing mice (D) as compared to control mice (C). Scale bar for A and B = 10 µm. Scale bar for C and D = 20 µm.