Preclinical

Preclinical services

A transparent view of the core workflow we use to move specimens from receipt to stained slides and pathologist evaluation—aligned with how we describe our process on pathxdx.com.

  1. 1

    Accessioning

    As specimens are received, they're checked to make sure what is received matches what was sent. A unique code (accessioning number) is assigned to every sample entering our lab.

  2. 2

    Trimming

    Every specimen may get a trim or possibly be cut so it fits the standard cassette and mold. The tissue is placed in a pre-labelled cassette.

  3. 3

    Tissue processing

    Tissue specimens that have been placed in a pre-labelled cassette go through a vacuumed infiltration process that dehydrates the tissues and infiltrates them in paraffin.

  4. 4

    Embedding

    When the tissue cassettes come out of the tissue processor, each individual specimen is embedded into molds. Depending on what the pathologist is hoping to see, a special orientation may be required.

  5. 5

    Sectioning

    Blocks are routinely sectioned into 4–5 micron sections on positively charged glass slides unless otherwise requested—for example, special stains, thinner or thicker sections, or curls for DNA/RNA analysis into sterilized tubes.

  6. 6

    Staining

    Sections on slides are routinely stained H&E for an initial pathologist reading.

  7. 7

    Special stains

    After an initial reading, special stains may be requested. Requestors may ask for any special stain. We maintain an extensive list of what we currently perform; if something is not on our routine list, we can assess or assist with your needs.

  8. 8

    Evaluation

    Upon your request, slides will be evaluated by a qualified pathologist. Stains may also be evaluated using software technologies. We partner with sister companies to provide such services at a pass-through cost.

  9. 9

    Pathology reading

    Upon your request, slides will be evaluated by a qualified pathologist.

  10. 10

    Immunohistochemistry (IHC)

    Based upon your needs we provide IHC services—including routine simple and complex panels, method development, and consultation.