Dear All, Attached is the Question Sheet for Diagnostic Exercise #258 contributed by Daniel McGilp, BSc, DVM, MANCVS, Ticiana Brasil Ervedosa, DVM, Viviana Gonzalez-Astudillo* BVSc, MNR, PhD, DACVP; Veterinary Laboratory Services, School of Veterinary Science, The University of Queensland, Gatton Campus. *Corresponding author: 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/