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 23,843 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A spayed female dog was evaluated because of edema of the ventral cervical region, lethargy, cough, and reduced exercise tolerance. Invasive thymoma and cranial vena cava syndrome were diagnosed by use of ultrasound-guided fine-needle biopsy and contrast-enhanced helical computed tomography. Resection of the cranial vena cava and an autogenous jugular vein graft were used for restoration of normal venous return to the right atrium and alleviation of the cranial vena cava syndrome.
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PMID:Use of a jugular vein autograft for reconstruction of the cranial vena cava in a dog with invasive thymoma and cranial vena cava syndrome. 1552 41

Tumors of the mediastinum represent a wide diversity of disease states. The location and composition of a mass is critical to narrowing the differential diagnosis. The most common causes of an anterior mediastinal mass include the following: thymoma; teratoma; thyroid disease; and lymphoma. Masses of the middle mediastinum are typically congenital cysts, including foregut and pericardial cysts, while those that arise in the posterior mediastinum are often neurogenic tumors. The clinical sequelae of mediastinal masses can range from being asymptomatic to producing symptoms of cough, chest pain, and dyspnea. This article will review the anatomy of the mediastinum as well as the different clinical, radiographic, and prognostic features, and therapeutic options of the most commonly encountered masses.
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PMID:Tumors of the mediastinum. 1623 67

Thymomas are common primary mediastinal neoplasms. They can be benign or malignant. The diagnosis of malignant thymomas is based on capsular invasion, cellular atypia and distant metastases. We present a case of invasive malignant thymoma as diagnosed on PET and CT scan with histologic correlation and review of literature. A seventy year old Asian man presented with cough and dyspnea. A CT scan showed an anterior mediastinal mass, and a PET scan showed a hypermetabolic mass in the corresponding location. Resection of the mass revealed a minimally invasive thymoma based on evidence of capsular invasion. PET scan proved invaluable in correctly diagnosing, staging the lesion, and excluding any extramediastinal involvement.
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PMID:Imaging of an invasive malignant thymoma on PET Scan: CT and histopathologic correlation. 1698 66

We present 2 resected cases of thymic tuberculosis, which had been preoperatively diagnosed as invasive thymoma, using a thallium-201 ((201)Tl) single photon emission computed tomography ((201)Tl SPECT). [Patient 1] A 74-old-male with a 32-year history of steroid therapy for rheumatic arthritis was diagnosed with an anterior mediastinal tumor by routine chest CT scans after onset of myocardial infarction. [Patient 2] A 56-old-female with a 28-year history of diabetes mellitus presented with a dry cough. A chest CT demonstrated an anterior mediastinal tumor. Neither patient showed pulmonary infiltrations on chest x-ray. (201)Tl SPECT was undertaken for each patient. Abnormal findings could not be detected on a planar image of the scintigraphy; however, on SPECT images accumulations of (201)Tl were clearly detected in the anterior mediastinal mass and a thymoma was thus suspected in each case. Total thymectomy was carried out in each case and the mass then diagnosed as caseous granuloma in the thymus. Both patients are well without recurrence after operation. In patients with a (201)Tl SPECT positive anterior mediastinal tumor associated with an immunologically deficient status, and with negative findings in planar images on thallium scintigraphy, the possibility of thymic tuberculosis should be considered.
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PMID:Thymic tuberculosis preoperatively evaluated with thallium-201 SPECT: two resected cases. 1739 71

A 75-year-old-woman had undergone extended thymectomy, right upper and middle lobe resection, and radiation therapy (40 Gy) for thymoma at the age of 63. She visited our hospital complaining of low grade fever, cough, anorexia and a sore throat. Peripheral blood count revealed agranulocytosis. Agranulocytosis associated with thymoma was diagnosed, because there were no other possible causes of agranulocytosis such as drugs, infection, recent radiation therapy, or bone marrow invasion. In spite of giving G-CSF, steroid therapy and immunosuppressants, she died of pneumonia caused by agranulocytosis. We consider that agranulocytosis is a very rare complication of thymoma.
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PMID:[Case of agranulocytosis associated with thymoma]. 1831 51

We report the case of a 23-year-old female patient, who was admitted to our hospital because of aggravating pain in the right shoulder, right chest and ear accompanied by cough and dyspnea. Imaging revealed a soft tissue mass in the mediastinum in close relation with an additional large mass extending in the right upper thorax, right axilla and neck. The tissue obtained during surgery showed the former mass to be a cystic thymoma, being in contact with an extensive vascular dysplasia. The characteristic clinical presentation, the contribution of imaging, the results of operation, and the follow-up are rather unique. The review of the literature did not reveal similar cases.
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PMID:Cystic thymoma coexisting with vascular dysplasia. 1902 20

Myasthenia gravis (MG) is an autoimmune disease. Approximately 15% of patients with MG have thymoma. Approximately 30% to 40% of them are invasive. A 26-year-old man was admitted with cough and difficulty breathing. He had transsternal thymectomy resulting from MG accompanied by thymoma 6 years previously. Thorax computerized tomography (CT) scans showed metastases to the extra-mediastinum. Diagnosis of invasive thymoma was made by CT-guided biopsy. A PAC regimen (cisplatin, doxorubicin, cyclophosphamide) and radiotherapy were added to MG treatment. Ten months later, he presented again with headache, weakness, and difficulty swallowing. We determined that he had intracranial multiple metastases. He was hospitalized. Cerebral multiple metastases were evaluated as inoperable. However, he died of transtentorial herniation after 1 month. This MG case accompanied by invasive thymoma with multiple intracranial metastases is discussed.
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PMID:Myasthenia gravis and invasive thymoma with multiple intracranial metastases. 1907 11

Extreme degree of cystic, haemorrhagic and necrotic changes in a thymoma is rare. A 22-year-old male presented with cough, grade 2 dyspnoea, and occasional chest pain for the past six months. Radiological investigations revealed a large cystic lesion in the anterior mediastinum. A benign cystic tumour was suspected. Surgical resection of the tumour was done. Grossly, the almost entirely cystic and haemorrhagic dumb-bell shaped encapsulated tumour showed a subcapsular residual nodule. Histopathological examination was suggestive diagnosis of benign thymoma (World Health Organization [WHO] Type A, medullary type) associated with the rare features of cells with dendritic processes containing melanin pigment seen singly scattered throughout the tumour.
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PMID:Giant cystic thymoma with haemorrhage and necrosis: an unusual case. 1944 48

Sternal dehiscence is one complication after median sternotomy. We followed a patient with sternal dehiscence for 6 months after extended thymectomy via median sternotomy. His diagnosis was myasthenia gravis without thymoma and with complicating diabetes mellitus. Sixteen days after the operation chest radiography revealed that one of six sternal wires was cut, although sternal dehiscence was not apparent. Six months after the operation, chest radiography revealed that five of six wires were cut. The patient experienced sternal dehiscence, could not cough, and felt pain at the median wound site. We implemented a resuture technique of the sternum using Shirodkar tape for postoperative sternal dehiscence. After the second operation, sternal dehiscence was not apparent. He was able to cough and had no respiratory deficiency. One year after the second operation, chest computed tomography revealed no sternal dehiscence. Shirodkar tape is extremely useful and is low in price.
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PMID:Resuture using Shirodkar tape for sternal dehiscence after extended thymectomy via median sternotomy. 1953 80

Metaplastic thymoma is an extremely rare tumor. To date, only 17 cases of metaplastic thymoma have been reported. To the best of the authors' knowledge, this is the second reported case of a sarcomatoid carcinoma arising in metaplastic thymoma; the carcinoma in this case is larger than that in the previous case. A 63-year-old woman with cough and asthenia for 2 weeks was admitted to the hospital. Computed tomography (CT) revealed a giant mass on the right side of the front mediastinum medium. The mediastinal tumor was excised, and additional pathological examinations, immunohistochemical tests, and electron-microscopic tests were performed. The tumor was diagnosed as a sarcomatoid carcinoma arising in metaplastic thymoma. Here, the authors discuss the clinical pathology of the sarcomatoid carcinoma arising in metaplastic thymoma and describe the biological behaviors with respect to the pathological features.
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PMID:Sarcomatoid thymic carcinoma arising in metaplastic thymoma: a case report. 2003 84


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