Partial Pancreatectomy for a Pancreatic Pseudocyst Associated with Chronic Pancreatitis in a Dog

A 12-year-old neutered male Shih Tzu (4.4 kg) presented with a twoweek history of chronic vomiting, anorexia, and lethargy.Abdominal ultrasonography revealed a 3.1 × 2.3 cm non-vascularized anechoic cystic lesion in the left pancreatic region, while computed tomography identified a cystic lesion measuring approximately 6 cm, with imaging findings suggestive of peritoneal inflammation.The cystic lesion was closely associated with the gastric body and pylorus.During exploratory laparotomy, dense fibrous adhesions were noted between the lesion and the stomach, duodenum, jejunum, and colon.Splenectomy was performed to provide adequate exposure of the left pancreatic limb.A partial pancreatectomy was performed using a vessel-sealing device.Histopathological examination revealed fat necrosis, hemorrhage, and abundant fibroplasia, findings consistent with a pancreatic pseudocyst.On postoperative day 15, ultrasonography revealed a 3.2 × 1.8 cm cystic lesion, which resolved following ultrasound-guided aspiration.No remarkable clinical or ultrasonographic abnormalities were observed during the 3-month follow-up period.While percutaneous or internal drainage is commonly described, this case suggests that partial pancreatectomy may be considered as an alternative treatment option in selected cases of a localized pancreatic pseudocyst with severe adhesions.