Case of the month - August 2006
Special stains
History - 50 year old female - clinical carcinoma left breast - core biopsies:
PAS
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PAS after diastase digestion
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CK pan
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ER (left) and S100 (right) - both negative
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Points to consider:
- Note PAS +ve cytoplasmic granules partly resistant to diastase
- Cytokeratin positive
- ER and S100 negative