Sample Submission

Sample Submission

Sample Submission Guidelines

  • Proper sample preparation and packaging are essential for optimal diagnostic quality and timely reporting

  • Please review the guidelines below before submitting samples to Pathwood Veterinary Laboratories

General Sample Preparation (All Submissions)

  • Place the completed submission form in the outer pocket of the shipping bag and ensure the bag is securely closed

  • Double-bag samples if there is any risk of leakage

  • Clearly label every jar or slide case with the patient name and sample site

  • Use appropriate containers and ensure all lids are tightly closed to prevent leakage during transit

  • Include ice packs in the shipping container when submitting fresh tissue

  • Cytology slides must be packaged separately from formalin-fixed tissues

Biopsy Samples

  • Submit tissues in appropriately sized formalin jars with adequate fixative volume

  • Large specimens (including spleen, limbs, and other organs) should be submitted fresh, not fixed

    • Fresh specimens should be packaged with ice packs for transport

  • Endoscopic biopsies may be submitted:

    • In cassettes within a formalin jar, or

    • Free-floating in a properly labeled formalin container

    • Do not wrap samples in paper or gauze, and do not use tongue depressors or similar materials

  • Avoid overpacking tissue, which can compromise fixation

Cytology Samples

  • Place slides in a protective slide case to prevent breakage

  • Clearly label each slide case with patient name and sample site

  • Ensure slides are fully air-dried prior to packaging

  • Important: Cytology slides should never be packaged in the same bag or container as formalin-fixed tissue

    • Formalin vapors can compromise cellular detail and stain quality

  • Do not include loose slides in the shipping container

Ancillary Testing Requests

If ancillary testing (such as immunohistochemistry, PARR testing, quantitative copper analysis, etc.) is requested:

  • Clearly indicate the requested test on the submission form

  • Submit samples according to the primary test type (biopsy or cytology), unless otherwise instructed

  • If you are unsure about sample requirements for a specific ancillary test, please contact the laboratory prior to submission

Mailing Samples

  • Ship samples to:

Pathwood Veterinary Laboratories

12063 15th Ave NE

Seattle, WA 98125

Shipping via FedEx

  • Discounted FedEx shipping rates are available to clients through the PVL client portal

  • Shipping labels can be generated directly when placing an order

Courier Service

  • Complimentary courier service is available in select areas of Northern California and Western Washington

  • For availability, scheduling, or questions, please contact the laboratory:
    📞 425-224-7759 or 657-269-8118
    ✉️ DrWood@pathwoodvetlab.com or DrColamussi@pathwoodvetlab.com