Figure 1.
The photomicrography shows a vesicular type of grain.
The hyphae are mainly in the periphery and are swollen. The centre of the grain consists of cement substance (H&E×40).
Figure 2.
The photomicrography shows melanin in the grain.
The hyphae at the periphery of the grain are covered with melanin (Masson-Fontana stain for melanin ×40).
Figure 3.
The photomicrography shows cements substance and hyphae staining a blue colour with Schmorl’s stain for melanin (Schmorl’s stain ×40).
Figure 4.
The photomicrography shows the hyphae and cement substances are positive for calcium (Von Kossa stain ×40).
Table 1.
The mean values of the heavy metals concentrations in the patients’ biopsies & the control.