FFPE tissue section

Frozen tissue sections of Creative Bioarray are made from high quality tissues immediately snap-frozen in liquid nitrogen after being excised, and then identified by a board- licensed pathologist. Tissues of Creative Bioarray's paraffin tissue sections are fixed in formalin immediately post excision and embedded in IHC-grade paraffin.

https://www.creative-bioarray.com/products/tissue-sections-20.htm