Charles Louis Davis and Samuel Wesley Thompson DVM Foundation

For the Advancement of Veterinary and Comparative Pathology | Phone: 847-367-4359 | Fax: 847-247-1869
  • 2018 Northeast Veterinary Pathology Conference

    Dr. John Cullen will be speaking on Parenchymal Diseases of the Liver.

  • 2018 Annual Gross Pathology Review Course

    Learn all about gross lesions in domestic, laboratory, and exotic animals.

  • 2018 Descriptive Pathology Course

    Brush ​​up ​​your ​​descriptive ​​​​skills ​​in ​​a ​​supportive environment.

  • Prof. Maja Suter Awarded Coveted Olafson Medal

    This medal has only been awarded 13 times since 1980 to eminent veterinary pathologists. It is highly fitting that Maja Suter is the first female recipient of the Olafson Medal.

  • Student Scholarship Awards

    The Foundation proudly awarded deserving residents and graduate students at the 2017 ACVP Annual Meeting.

  • 2017 Southcentral Division Meeting

    The meeting was held at Texas A&M Galveston Campus in October, 2017. Annual dinner at Landry's!

  • 5th International Seminar on Veterinary Pathology and Ichthyopathology

    It was held at the Universidad National de Colombia in Bogota, Colombia in August, 2017.

  • IV Chilean Meeting on Veterinary Histopathology

    It was organized by Dr. Carlos Gonzalez from Andres Bello University, and sponsored by the Latin Comparative Pathology Group (the Latin-American Division of the Foundation).

CE Portal

Course ID: 166488
Title: Descriptive Veterinary Cytology

Length: 02:00:00
Author: Bruce H. Williams, DVM, Diplomate, American College of Veterinary Pathology
Description: This 2-hour lecture on descriptive cytology techniques covers proper creation and basic interpretation of cytologic preparations for the anatomic pathologist. It focuses on the limits of interpretation of cytology and how to differentiate inflammatory versus neoplastic lesions. It further delves into interpretation of common inflammatory and neoplastic lesions, concentrating on the commonly aspirated skin lesions, using case reports.

Noah's Arkive

The Foundation is proud to make Noah's Arkive, a searchable collection of veterinary pathology images, available online at no cost. Special thanks to the University of Georgia for transferring the database and image collection to the Foundation!

Random Image:

CL Davis Diagnostic Exercises

The main goal of these Diagnostic Exercises is to provide interesting cases, focusing on the gross pathological lesions and associated histopathologic or cytologic findings. This material can be of great use for veterinary students, in-training pathologists, and ACVP diplomates alike.

There will be one contribution per month of the year; anyone may contribute. To do so, please contact Dr. Vinicius Carreira at to identify a convenient date for your submission and to receive templates to be used. Spots will be filled out on a first-come first-served basis.

Exercise Thumbnail Answer
Click here for case history Click here for case synopsis

Twitter Feed - @cldavis_vetpath

Facebook Feed - Davis/Thompson Group

Testing the first in a series...
Any and all feedback are greatly appreciated.
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New today in Noah's from Dr. Pazo Uzal of CAHFS

Tissue from an ox.

Morphologic diagnoses (2): 1. Focally extensive necrotizing hepatitis 2. Hepatic lipidosis

Cause: Clostridium hemolyticum

Comment: Unlike most other species, the liver and muscles of the ox is not a sterile environment. Spore-forming clostridia of a number of species (including most famously C. chauvoei, C. novyi, and C. hemolyticum, among others) populate the liver, heart, and skeletal muscles, waiting for the proper ischemic conditions to truly gum up the works.

In this case of liver necrosis, the ischemia caused by migration of large numbers of Fasciola hepatica, on their way to their new homes in the bile ducts, is enough to allow these bacteria to proliferation, and liberate phospholipase C, destroying the cell membranes of the hepatocytes around them, and a deadly chain reaction of ischemia, hepatocellular necrosis, and bacterial proliferation occurs. The same toxin can also result in destruction of erythrocyte membranes, resulting in intravascular hemolysis, which is severe enough to result in visually appreciable hemoglobinuria in affected animals.

The name of the condition is bovine bacillary hemoglobinuria.

The cause of the hepatic lipidosis is unknown, and may be the result of smoldering disease, inanition, and mobilization of peripheral fat stores, or may be related to gestation and stage of lactation - hepatic lipidosis has nothing to do with the pathogenesis, but really makes the clostridial lesion visually "pop" - a little fat makes for a more dramatic lesion!
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New today in Noah - another new contributor (keep them coming!) - Dr. Tom Baldwin from Utah State University.

Tissue from am 8-year old Golden retriever.

Morphologic diagnosis: Right atrial hemangiosarcoma

Comment: Beautiful picture of one of the triad of favored locations for this neoplasm - right atrium, liver, and spleen.

Look for metastasis in the lung with these - a little piece breaks off and get in the circulation and goes into the lung where it gets clogged in the alveolar capillaries and starts to grow.
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