• Journal of Veterinary Clinics
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• v.25 no.3
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• pp.187-191
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• 2008

A 7-year-old, intact female Yorkshire terrier dog was presented for coughing, anorexia, chest pain and dyspnea. Right lateral thoracic radiograph demonstrated a large mass shape on the heart base with decreased cardiac silhouette and severe right deviation of the trachea with the heart shifted to the left thoracic wall was observed on the ventrodorsal thoracic projection. Echocardiographic examination revealed a large rounded mass compressing left atrium around the heart base without signs of pericardial effusion. On computed tomographic (CT) findings, sagittal CT images depicted the possibility of cranial vena caval invasion and heart base involvement of the mass associated with biatrial compression. Dorsal CT image revealed the right deviation of trachea due to the heart base mass and markedly shrunk lung space was detected on the transverse CT image. Because the dog suddenly had died during the recovery from anesthesia after finishing CT scan, necropsy was performed. On gross findings, a large and lobulated mass was located at the base of the heart. A poorly-demarcated, infiltrative, multilobulated tumor composed of polyhedral cells in solid cellular sheets was confirmed based on histopathologic examination. This dog was diagnosed as a chemodectoma. This case report describes the clinical findings, diagnostic consistency of thoracic radiography, echocardiography and CT, and histopathologic confirmation in a spontaneously occurring chemodectoma with a Yorkshire terrier dog.

• Korean Journal of Veterinary Research
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• v.47 no.3
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• pp.309-314
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• 2007

A 7-year-old, intact female Korean Jindo dog was referred due to ataxia and pain on palpation of the thorax. Radiograph, echocardiography and computed tomogram revealed a mass on the heart base region and osteolytic change of fifth thoracic (T5) vertebra. At necropsy, a firm, encapsulated and round mass was seen arising from the heart base region surrounding the ascending aorta and pulmonary artery. Histopathologically, nests of cuboidal and polyhedral cells having abundantly granular and eosinophilic cytoplasm with round to oval nucleus were separated by fibrous septa. Immunohistochemistry using chromogranin A revealed that tumor cells were originated from neuroendocrine organ and metastasized into some organs including lung, spleen, liver, kidney and T5 vertebra. By electron microscopy, we found the electron-dense and membrane-bound granules in cytoplasm of the tumor cells. This study provides the uncommon evidence that aortic body tumor metastasized to both multiple organs and bone.

• Journal of Veterinary Clinics
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• v.17 no.1
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• pp.173-177
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• 2000

A 3-year-old male Tosa was presented the severe dyspnea, emaciation and dehy dration. By echocardiograpy, right ventricle was found to be a mobile mass dynamically occluding the right ostium atrioventriculare in the systolic phase. At necropsy, 14 days after ultrasonography multiple tumor masses of various size were observed in the heart base, right ventricular lumen, myocardium, lung and liver. Histopathologically, the tumor cells, arranged in sheets or nests, were diagnosed as metastatic intracavitary cardiac aortic body tumor

• Journal of Veterinary Clinics
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• v.31 no.4
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• pp.303-306
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• 2014

Three Yorkshire Terriers (12-year-old, 13-year-old, and 15-year-old castrated males) with respiratory distress, coughing and anorexia were the subjects of this report. In laboratory examinations, there were no remarkable findings. However, the thoracic radiographic findings included a large mass of soft tissue density in the cardiac base region, tracheal elevation, and aortic bulging in all three Yorkshire Terriers. There were no remarkable findings in the abdominal radiographs. In echocardiography, a homogeneous hyperechoic mass around the aorta and bicuspid valve regurgitation were found in all three dogs. There were no remarkable findings in abdominal ultrasonography. Computed tomographic findings showed a large well -defined heterogeneous mass in the cranial vena cava, which was dominant in the left side in all three Yorkshire Terriers. The mass sizes were about $3{\times}4cm$. In post-contrast scanning, contrast enhancement was evident. These cases were diagnosed as heart-base tumor. Treatments provided to the three dogs were based on symptomatic medical management of cardiac failure and tracheal collapse. Case 1 (12-year-old) survived for 3 months, case 2 (13-year-old) for 5 months, and case 3 (15-year-old) for 32 months after the diagnosis. Our results show that the clinical findings, thoracic radiography, echocardiography, computed tomography (CT) and symptomatic medical management in dogs suspected to have heart base tumor.

• Investigative Magnetic Resonance Imaging
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• v.25 no.1
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• pp.47-52
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• 2021

Paraganglioma is a rare tumor of paraganglia, derived from neural crest cells in sympathetic or parasympathetic ganglions. It can be widely distributed from the skull base to the bottom of the pelvis. The pancreas, however, is a rare location of this neoplasm, and only a limited number of cases have been reported in the English literature, especially with gadoxetic-acid-enhanced magnetic resonance imaging (MRI) and diffusion-weighted images (DWI). We herein report a case of pathologically proven paraganglioma in the pancreas head with a literature review on endoscopic ultrasonography (EUS), computed tomography (CT), gadoxetic-acid-enhanced MRI, and DWI sequence.

• Korean Journal of Veterinary Research
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• v.22 no.2
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• pp.247-251
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• 1982

A 6-year-old male German Shepherd was admitted to the Armed Forces Second Animal Clinic for clinical examination The symptoms were anorexia, dyspnea, emaciation and ascites. Treatment was given for a month but its condition did not improve, euthanasia was therefore performed and the dog was submitted for necropsy. A tumor was found at the base of the heart between the ascending aorta and the pulmonary artery It was diagnosed an aortic body tumor by clinical signs, gross lesions and histopathologic features.

• Journal of Chest Surgery
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• v.39 no.8 s.265
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• pp.637-639
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• 2006

Cardiac myxoma is the most common primary tumor of the heart, but right ventricular myxoma causing outflow obstruction is relatively rare. A 15 years old girl developed dyspnea on exertion and intermittent syncope caused by a right ventricular mass obstructing the right ventricle outflow tract. Transthoracic echocardiography revealed $3.6{\times}3.0\;cm$ sized pedunculated subpumonic mass originating from the right ventricular anterior free wall. The patient underwent an emergency operation, consisting of the removal of the mass by wide excision of the tumor base and PTFE (polytetrafluoroethylene) patching of the right ventricular anterior free wall defect. Pathological findings of the mass were compatible with myxoma, and the patient was discharged uneventfully 7 days after the operation.

• Journal of Chest Surgery
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• v.16 no.4
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• pp.470-475
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• 1983

Myxoma of the heart can now be successfully treated but the success is obviously dependent upon the correct diagnosis and treatment prior to development of catastrophic complications such as sudden death, embolism or cardiac failure. The right ventricular myxoma is very rare, and we treated successfully a case of giant right ventricular myxoma, sessile tumor originated from ventricular apex, weighed 175 gm. The tumor base was broad, about 3 cm x 3cm, and it was hardly adhesed to the tricuspid valvular structures, but could remove with the preservation of adequate residual ventricular chamber size and the maintenance of functional tricuspid valve anatomy. The postoperative course was excellent and uneventful.

• Journal of Chest Surgery
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• v.28 no.7
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• pp.713-716
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• 1995

A 75-year-old man was admitted to the hospital because of a pericardial effusion.After 3 L of blood-stained pericardial fluid was drained, clinical examination together with echocardiography and chest computed tomography showed a tumor in the right atrium. At operation a pedunculated vascular tumor was found with a broad base which was embedded in the atrial wall and extended into the pericardium.A wide resection was performed resulting in a large defect of the right atrial wall. The defect was reconstructed with a pericardial patch. The patient did well postoperatively, but bloody pleural effusion developed later, presumably because of pulmonary metastasis. The patient died 2 months after surgery as a result of respiratory failure.

• Journal of Veterinary Clinics
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• v.31 no.5
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• pp.407-411
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• 2014

A 12-year-old castrated male Pekingese dog was presented with weakness, exercise intolerance, and an episode of coughing started 2 weeks earlier upon presentation. Physical examination revealed a grade II/VI left systolic heart murmur. Echocardiographic examination revealed a pericardial effusion and a mass at the heart base located beside the left atrium. The mass beside the left atrium was also visible on the thoracic radiograph after drainage of the pericardial effusion. An aortic body tumor was definitely diagnosed based on postmortem histopathological examination and immunohistochemical staining for specific markers. The dog lived 234 days after diagnosis with only medical management and without recurrence of the pericardial effusion.