## Deciding on an immunohistochemical panel
Transcription factors tend to be very highly expressed, even in poorly differentiated tumors. Examples include:

* SATB2 (esp. in lower GI mucosal/NET, cutaneous NET, bone, and *BCOR*-rearranged sarcomas)
* GATA-3 (breast)

## Stains to determine oncologic treatment
* SCC:
    * PD-L1
* Lymphoma:
    * CD45, CD43 (R-CHOP)
* Melanoma
    * SOX10 (Anti-BRAF, checkpoint inhibitors)