davis_members@list.cldavis.org, discussion@aavld.org, rozuna@aavld.org Dear All, Attached is the *Question Sheet *for Diagnostic Exercise #*280* contributed by Michelle Rubio Sanchez1 and Lauren W. Stranahan1. 1Texas A&M University College of Veterinary Medicine & Biomedical Sciences. *Corresponding author: *lstranahan@cvm.tamu.edu 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/