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Special Stains Quick Reference
- PAS — glycogen, fungi, basement membrane (magenta)
- PAS-D — glycogen removed (distinguishes)
- Reticulin — reticulin fibres (black)
- Masson trichrome — collagen (blue/green)
- Congo red — amyloid (apple-green birefringence)
- ZN / AFB — acid-fast bacilli (red)
- GMS — fungi, Pneumocystis (black)
- Perls — iron/haemosiderin (blue)
Confirm interpretation with the pathologist; run controls.
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