PD-L1 22C3 FDA for Ovarian Carcinoma

Preferred specimen (FFPE block): 
A formalin-fixed,  paraffin-embedded (FFPE) tissue block is the preferred specimen type. Use 10% NBF fixative; do not use zinc or mercury fixatives.
If submitting slides (instead of a block): 
Submit the following. All slides cut at 4–5 microns. Please use positively-charged slides and 10% NBF fixative.
* H&E slide: One (1) unbaked, unstained slide for H&E staining (required) or client H&E.
* Cut Slides: Two (2) positively charged unstained slides for each IHC test ordered.
PD-L1 22C3 evaluation:
Tissue submitted must have >100 viable tumor cells present.
Specimen identification: 
Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.

Slides may be stored at room temperature; transport with cold pack, making sure cold pack is not in direct contact with specimen.
NYS clients: Provide date and time of collection.