View source for AE1/AE3

{{ Infobox immunostain
| Name       = {{PAGENAME}}
| Image      = 
| Width      =
| Caption    = 
| Abbrev     =
| Synonyms   =
| Similar    = [[Z622]]
| Clones     =       
| Use        = [[unknown primary]], confirm primary
| Subspecial =   
| Pattern    = membranous
| Positive   = most carcinomas
| Negative   = most lymphomas, most sarcomas
| Other      =
}}
'''AE1/AE3''' is a common [[immunostain]] that marks keratins. It is considered a [[pankeratin]] by most.

==Positive==
*Most or all [[carcinoma]]s.

Sarcomas:
*[[Chordoma]].
*[[Desmoplastic small round cell tumour]].
*Most [[epithelioid sarcomas]].
*Others.

==Negative==
*Most lymphomas.
*Most sarcomas.
**[[Biphenotypic sinonasal sarcoma]].

==See also==
*[[CK7]].
*[[CK20]].
*[[EMA]].
*[[Cytokeratin Z622]].

[[Category:Immunohistochemistry]]