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Related Flashcards
Cards In This Set
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Three types of pigments
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Artifact, exogenous, endogenous
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Various coloring agents deposited frequently as cytoplasmic inclusions or granules in cells and tissues
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Pigments
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Colored not always necessary to stain them w/biological dyes, however special stains may be necessary for differentiation
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Pigments
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Birefringent fibers of magnesium silicate thta may be found in lungs of persons exposed to large quantities
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Asbestos fibers
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Fibers cause a tissue reaction that develops into mesothelioma
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Asbestos fibers
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After inhilation fibers become coated with an iron-containing protein and are know as
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Asbestos bodies
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Found in skin that has been tattoed but ocassionally found in associated lymph node
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Tattoo pigments
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These pigments include a variety of organic and inorganic pigments that rarely need specific identification
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Tattoo pigments
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Deposited in tissue either as normal (iron) or in pathological conditions (wilsons disease)
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Metals
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Deposited in tissue as a result of a chemical reaction,
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Artifact pigments
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Have been reported to be seen withing the cell cytoplasm
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Formalin pigments
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Produced in tissue processing and commonly result from fixation. usually lie ontop of tissue and not within the cell.
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Artifact pigments
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Deposited in tissue fixed in any mercury containing fixative
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Mercury pigments
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Removed easily by treatin section w/a solution of iodine followed by a solution of sodium thiosulfate
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Mercury pigment
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May form if tissue fixed in solution containing potassium dichromate is not washed in running water before dehydration
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Chrome pigment
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