Long‐term outcomes of dogs undergoing surgical resection of mast cell tumors and soft tissue sarcomas: A prospective 2‐year‐long study

Objective Report clinical outcomes of dogs with surgically excised mast cell tumors (MCT) and soft tissue sarcomas (STS). Study design Prospective clinical study. Sample population Fifty‐three dogs with 52 MCT (50 low grade, 2 high grade) and 19 STS (12 grade I, 6 grade II, 1 grade III). Methods All dogs were examined at 3, 6, 12, 18, and 24 months postoperatively, with cytologic or histopathologic evaluation of suspected local recurrences. Dogs euthanized because of study tumor‐related causes underwent necropsy. Results Median intraoperative margins were 20 mm and 30 mm wide for MCT and STS, respectively, with 1 fascial plane resected en bloc. The narrowest histologic tumor‐free margins measured