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UND 363 Grimelius
| Question | Answer |
|---|---|
| purpose for Grimelius stain | demo argyrophil granules in neurosecretory tumors |
| principle for Grimelius stain | argyrophil tech. therefore can bind silver but cannot reduce w/t reducer substance |
| fix for Grimelius stain | NBF, but Bouins give a better intense stain and result |
| tech | 4-5 chem cleaned glass |
| qc | argyophil pos. (carcinoid tumor preferred), but can used sm. intestine |
| reagents | silver nitrate/acetic acid/sodium trihydrate - impregnation, hydroquinone/soduim sulfite - reducig agent, N fast red - counterstain |
| results | argentaffin/argyrophil granules - dk brown to black, nuclei - red, background - pale yellowbrown |
| since argentaffin and argyrophil substances stain what should be done to differentiate them | use both grimelius and fontana masson (with 2 diff slides) and compare |