Dear All, Attached is the Question Sheet for Diagnostic Exercise #253 contributed by Ticiana Brasil Ervedosa¹, Stephanie Shaw3, Paul Canfield2, Viviana Gonzalez Astudillo¹*, 1The University of Queensland, School of Veterinary Science, Queensland, Australia. 2The University of Sydney, School of Veterinary Science, New South Wales, Australia. 3Department of Environment and Science, Queensland, Australia. *Corresponding author: E-mail: v.gonzalez@uq.edu.au Best Regards Claudio The Diagnostic Exercises are an initiative of the Latin Comparative Pathology Group (LCPG), the Latin American subdivision of The Davis-Thompson Foundation. Members and non-members from any country of residence may contribute to these exercises. Please consider contributing a case to this initiative. It does not have to be unusual, and all pathology sub-specialties are welcome! Please consult instructions on how to format and submit your DE at https://davisthompsonfoundation.org/diagnostic-exercises-instructions/ Previous cases are available at https://davisthompsonfoundation.org/diagnostic-exercise/