Lumbar round cell sarcoma in a 10-week-old rottweiler puppy. - Kristiansen, Katrine Vestergaard; Schrøder, Anders Simon; Bienzle, Dorothee; Vedel, Tanja; Agerholm, Jørgen Steen; Berendt, Mette (Acta Veterinaria Scandinavica, 2025)