Dynamic Obstruction of an Anomalous Cavoazygos Vessel Associated with Interrupted Caudal Vena Cava in a Boxer Dog.
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ABSTRACT:
SUBMITTER: Allen M
PROVIDER: S-EPMC8883142 | biostudies-literature | 2022 Feb
REPOSITORIES: biostudies-literature
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Dynamic Obstruction of an Anomalous Cavoazygos Vessel Associated with Interrupted Caudal Vena Cava in a Boxer Dog.
Allen Meghan M LeBlanc Nicole N Scollan Katherine F KF
CASE (Philadelphia, Pa.) 20211216 1
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Project description:ObjectiveTo report laparoscopic resection of retroperitoneal paraganglioma close to the caudal vena cava in a dog.Study designCase report.AnimalTwelve-year-old, neutered male Jack Russell terrier.MethodsThe 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.ResultsThe 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.ConclusionRetroperitoneal 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.
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Project description:Pheochromocytomas are catecholamine-secreting tumors that are composed of neuroectoderm-derived chromaffin cells. An 8-year-old miniature dachshund with abdominal distension was diagnosed with a neuroendocrine tumor with invasion from the caudal vena cava to the right ventricular cavity. The dog died due to hypotensive shock from the vagal reflex, and on autopsy, an extra-adrenal pheochromocytoma (paraganglioma) was diagnosed in the caudal abdomen. At autopsy, the tumor plug of the caudal vena cava was confirmed. To the best of our knowledge, this is the first case report that echo-captured the extension of pheochromocytoma in the right ventricle and shows it in a figure and video file.
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| S-EPMC8326212 | biostudies-literature
Project description:Superior vena cava obstruction syndrome was studied in 22 patients with a view to assess the etiological pattern and clinical profile. It was found that 4 patients (18.1%) had benign disease and the remaining 18 (81.9%) patients had malignancy. In 13 patients (59.9%) obstruction occurred due to bronchogenic carinoma. No complications occurred with invasive diagnostic procedures. All heavy smokers (59.9%) were found to have malignancy. Normal lung fields on chest radiography and CT scan with superior vena obstruction syndrome suggested benign disease in 2 cases.
| S-EPMC5530844 | biostudies-other
Project description:BackgroundA normal visceral arrangement is called situs solitus, whereas a state of visceral arrangement in a mirror-like positional relationship is called situs inversus (SI). Among the SI, the state in which the positions of only some thoracoabdominal organs are reversed is called situs inversus partialis, and the state in which the positions of all thoracoabdominal organs are reversed is called situs inversus totalis (SIT). Clinical information on dogs with SIT is limited.Case presentationA 4-month-old Shiba Inu was referred with depression and neurological symptoms as the chief complaints. Computed tomography (CT) revealed the patient had SIT with an extrahepatic portosystemic shunt (EHPSS) and azygos continuation of the caudal vena cava. In addition, complete reversal of the lung lobes and cardiovascular system in the thoracic cavity was confirmed. The patient underwent surgery for partial attenuation of the EHPSS on day 8 after the initial examination. On day 124, after the initial examination, a second surgery was performed for complete attenuation. Under celiotomy, the positions of all abdominal organs, except for the rectum, were inverted; thus, SIT was confirmed via gross observation. In addition, the use of braided nylon sutures partially attenuated the concurrent portocaval shunt. At the conclusion of this study, approximately 6 years had passed since the second surgery, and the patient had a good general condition without any medications.ConclusionIn SIT, the complex anatomy of the abdominal organs and vessels is difficult to identify via gross observation. In contrast, CT is effective in detecting vascular abnormalities, confirming the anatomical position of each organ, and allowing for the definitive diagnosis of SIT.
| S-EPMC11846404 | biostudies-literature
Project description: Not available
| S-EPMC9361334 | biostudies-literature
Project description:The number of cases of superior vena cava syndrome (SVCS) increased due to increased cardiac devices and central venous catheters. Management of benign SVCS is still controversial. A 51-year-old male known to have ischemic cardiomyopathy and chronic renal failure on regular hemodialysis. In the last 12 months, he had progressive shortness of breath and swelling of his upper part of the body. Examination revealed engorgement of the neck veins, facial puffiness, and pitting edema of both upper limbs. Venography showed occluded SVC. We applied a 50 Watt of energy via electrocautery pen to a Hi-Torque 0.014 Astato guidewire to cross the occluded segment retrogradely. We used 2 stents 39 mm, mounted on BIB 20/40 mm. Final angiography revealed full restoration of SVC flow. Diathermy use to cross a chronic total SVC obstruction is feasible and safe. Endovascular techniques are suitable as initial management of benign SVC syndrome.
| S-EPMC7283972 | biostudies-literature
Project description:ObjectivesTo evaluate the hemodynamicdynamic advantage of a new Fontan surgical template that is intended for complex single-ventricle patients with interrupted inferior vena cava-azygos and hemi-azygos continuation. The new technique has emerged from a comprehensive pre-surgical simulation campaign conducted to facilitate a balanced hepatic flow and somatic Fontan pathway growth after Kawashima procedure.MethodsFor 9 patients, aged 2 to18 years, majority having poor preoperative oxygen saturation, a pre-surgical computational fluid dynamics customization is conducted. Both the traditional Fontan pathways and the proposed novel Y-graft templates are considered. Numerical model was validated against in vivo phase-contrast magnetic resonance imaging data and in vitro experiments.ResultsThe proposed template is selected and executed for 6 out of the 9 patients based on its predicted superior hemodynamic performance. Pre-surgical simulations performed for this cohort indicated that flow from the hepatic veins (HEP) do not reach to the desired lung. The novel Y-graft template, customized via a right- or left-sided displacement of the total cavopulmonary connection anastomosis location resulted a drastic increase in HEP flow to the desired lung. Orientation of HEP to azygos direct shunt is found to be important as it can alter the flow pattern from 38% in the caudally located direct shunt to 3% in the cranial configuration with significantly reversed flow. The postoperative measurements prove that oxygen saturation increased significantly (P-value = 0.00009) to normal levels in 1 year follow-up.ConclusionsThe new Y-graft template, if customized for the individual patient, is a viable alternative to the traditional surgical pathways. This template addresses the competing hemodynamic design factors of low physiological venous pressure, high postoperative oxygen saturation, low energy loss and balanced hepatic growth factor distribution possibly assuring adequate lung development.Date and number of irb approval25 October 2019, 280011928-604.01.01.
| S-EPMC9159461 | biostudies-literature
Project description:Obstruction of the inferior vena cava (IVC) following surgical repair of an atrial septal defect (ASD) is a rare complication. We present the case of a patient who developed IVC obstruction following surgical repair of a large secundum ASD. The diagnostic and management approaches used to care for this patient are discussed. (Level of Difficulty: Intermediate.).
| S-EPMC8305682 | biostudies-literature