Pigments and Minerals Flashcards
what is an artifact pigment
a pigment that is deposited in the tissue as a result of a chemical action during processing, usually from fixation
what are three examples of artifact pigment
mercury
formalin
chrome
what are three examples of exogenous pigments
carbon
asbestos
tattoo ink
what is the best way to see asbestos fibers
electron microscopy
which stain is used to see asbestos fibers
Prussian blue FE stain
what is this and what is it showing
lymph node filtering carbon (black areas) on H&E
what is this showing
tattoo ink in the dermal layer
what is a hematogenous endogenous pigment
pigments produced within the body tissue, typically derived from the blood
what are the three types of hematogenous endogenous pigments
hemoglobin, hemosiderin, and bile pigments
what stain is this
Prussian blue
what stain is this
bile stain
what are the three types of non hematogenous endogenous pigments
melanin
lipofuschin
uric acid metabolism
what must gout crystals be placed in
alcoholic fixatives - NO WATER
what is this showing
polarizing light showing uric acid (gout) crystals
what stain is this
GMS silver stain
what stain is this and what is it positive for
stain: Von Kossa (silver stain)
positive for: calcium
what stain is this
Alizarin Red stain
