Dear All, Attached is the Question Sheet for Diagnostic Exercise #260 contributed by Renata Brizzio1 Cecilia Degiovanni1*, Ana Maria Martin1 1Patologia Animal Cordoba, Cordoba, Argentina. *Corresponding author: cecidegiovanni28@gmail.com 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/