Northwest LaboratoryPathology is now Avero Diagnostics.


Results Per Page

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PathVysion FISH

Breast Pathology, Molecular Pathology

Test Code


CPT Code


Transport Temperature and Stability

Paraffin block:

room temperature indefinitely

Positively charged slides:

room temperature 30 days

Rejection Criteria

Specimens collected using alternative methods may not be rejected but may include a disclaimer on the final report

Transport Container / Specimen

Formalin-Fixed, Paraffin embedded breast tissue block(s) OR 2-4 unstained slides and one H&E stained slide

Turn Around Time

48 - 72 hours


  1. Collect biopsy(ies) with care. Avoid crushing the specimen with forceps or other instruments.
  2. Place tissue in 10% neutral buffered formalin within one hour of excision.
  3. Notate on requisition the time of tissue collection and cold ischemic time.
  4. Label specimen container with two patient identifiers.

Test Setup

Monday - Friday (days)


Fluorescent In-Situ Hybridization (FISH)

Download the requisition.