Laparoscopic resection of retroperitoneal paraganglioma close to caudal vena cava in a dog

Abstract

Objective: To report laparoscopic resection of retroperitoneal paraganglioma close to the caudal vena cava in a dog. Study design: Case report.Animal: Twelve-year-old, neutered male Jack Russell terrier. Methods:The dog had undergone three previous cystotomies for bladder stones. On follow-up ultrasonographic evaluation, a 14-mm × 17-mm tumour was incidentally detected in the dorsal midline of the caudal abdomen. The dog underwent computed tomography (CT) imaging and ultrasound-guided fine needle aspiration of the tumour under general anaesthesia. CT imaging showed that the tumour was close to the caudal vena cava. There was no evidence of metastasis. Neuroendocrine tumour was suspected on cytologic examination. Based on these findings, laparoscopic tumour resection was performed using a vessel-sealing device. The operation time was 136 minutes. Results:The dog was stable after recovery from anaesthesia and discharged to home the next day. Histopathological diagnosis of the tumour was a paraganglioma. The dog remained without clinical evidence of recurrent tumour or metastasis for 670 days after the surgery. Conclusion:Retroperitoneal paraganglioma in dogs is uncommon, but it is one of the differential diagnoses of a retroperitoneal tumour. Laparoscopic resection of a retroperitoneal paraganglioma was successfully performed in the dog. Laparoscopic resection conferred the advantages over open surgery of being minimally invasive, providing better visualization of the surgical field through pneumoperitoneum and semisternal patient recumbency, and allowing for magnification of the operative field, which facilitated the ease and safety of the procedure.

Histopathological and Immunohistochemical Evaluation of Canine Nerve Sheath Tumors and Proposal for an Updated Classification

“…In dogs, the classification of paragangliomas is not well defined because the information is lacking and mostly limited to case reports. Described cases in dogs often originate in the aorta or carotid body [ 43 , 44 ]. In our opinion, the inclusion of paraganglioma in the group of NSTs in dogs could be considered, but a deeper insight into this particular entity would be needed.…”

Application of a highly simulated and adaptable training system in the laparoscopic training course for surgical residents: Experience from a high-volume teaching hospital in China

“…Generally, it can only be available for single-person training, so they are no longer sufficient for an advanced laparoscopic training course. Live animal experimentation is still the most acceptable platform for laparoscopic simulation training, but laparoscopic training usually adopts medium to large animals that are closer to human anatomies, such as pigs and dogs, so it needs to be conducted in a qualified animal laboratory, equipped with clinical laparoscopic equipment, instruments and anesthesia support, including pneumoperitoneum, vital monitor, and anesthesia machines [ 27 , 28 ]. Therefore, the single training cost of live animal experiments is relatively high, and it cannot completely cover all stages of laparoscopic training and involves animal ethical issues and risks associated with the administration of anesthetic drugs [ 29 ].…”