Dear All, Attached is the Question Sheet for Diagnostic Exercise #256 contributed by João Paulo da Silva Cavasani1, Wuglenya Daislla Martins da Silva1, Lucas Avelino Dandolini Pavelegini1, Edson Moleta Colodel1, Fernando Henrique Furlan1* 1Veterinary Pathology Laboratory, Veterinary Hospital, Federal University of Mato Grosso, Brazil. 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/