Knowledge Base › Troubleshooting Atlas › Special stains
Mucicarmine non-specific staining
What it looks like
Mucicarmine staining shows red to pink cytoplasmic granules in tissue sections.
Where it usually appears: Typically appears in sections of mucin-producing tumors or tissues.
Likely causes
- Overstaining due to prolonged exposure to the stain
- Contamination with other chromogens or stains
- Inadequate washing steps after staining
Immediate checks
- Verify staining time against protocol
- Check for any visible contamination on slides
Corrective action
- Shorten staining time to recommended duration
- Increase washing time to remove excess stain
Preventive action
- Follow SOP closely for staining times and washes
- Ensure all reagents are fresh and properly stored
This atlas is for educational purposes for laboratory professionals. It does not replace your institutional SOPs, manufacturer instructions, validated protocols or pathologist judgment. Adapt any action to your laboratory and equipment.
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