AE1/AE3

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AE1/AE3 is a common immunostain that marks keratins. It is considered a pankeratin by most.

AE1/AE3
Immunostain in short
Similar stains Z622
Use unknown primary, confirm carcinoma
Normal staining pattern membranous
Positive most carcinomas
Negative most lymphomas, most sarcomas

Positive

Sarcomas:

Negative

See also