General Veterinary Pathology

PIGMENTATIONS

	Anthracosis:  Lung Note the blackish granules (coal particles) around bronchioles, in the interstitial tissue and also inside the large mononuclear cells.
	Anthracosis: Lymph node
	Haemosiderosis: Spleen Note golden brown haemosiderin pigments in the cytoplasm of macrophages.
	Perl’s stain The bluish staining iron pigments
	Bile pigment:  Liver  Note the light   brownish pigment (Haematoidin) in the billiary canaliculi.  This is Perl’s stain negative.
	Melanin Note the dark brownish   clumps   of   melanin granules inside   the melanoblasts (Melanoma).