Submission Information

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Eligibility Requirements

For this study we are requesting

  • Post-mortem tissue samples from the gastroesophageal sphincter and esophagus of dogs with megaesophagus diagnosed either pre or post mortem.
  • Patient medical records documenting the megaesophagus diagnosis and underlying etiology if known. 

Instructions for Sample Collection

Samples should be fresh or refrigerated and preserved in formalin and include the following:

  1. The entire gastroesophageal sphincter
  2. 1 inch long, full thickness segment of the mid-esophageal body.

Samples can be submitted in 1 of 2 ways

Option 1: Direct Submission

After collecting samples, they can be sent directly to:

Washington Animal Disease Diagnostic Lab (WADDL)
1940 SE Olympia Ave
Pullman, WA 99164
c/o Dr. Chrissy Eckstrand or Dr. Laura White

Please include clinic information and patient information with the submission.

Medical records can be sent by email to

Option 2: Request a Submission Packet

After collecting samples, contact us to request a submission packet containing a prepaid shipping label and shipping supplies.

The packet will contain information on submitting patient medical records and how to receive a reimbursement amount for sample collection.