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Biomedical subjects

M S Shin

Publications and source records attributed to M S Shin.

179 records · Page 10Linked to original sources
PubMedDate not supplied

Computed tomography on invasive thymoma.

We report a case of invasive thymoma invading and occluding the superior vena cava in which the diagnosis was only made by the computed tomography (CT) study. Correlation of CT and autopsy findings of invasive thymoma were made in order to emphasize the usefulness of CT study in the evaluation of thymoma and its relationship with vascular structures.

Humans↗
PubMedDate not supplied

CT fluid bronchogram: observation in postobstructive pulmonary consolidation.

Twelve patients with bronchial obstruction secondary to either cancer or broncholith were evaluated with chest radiography and computed tomography (CT). Chest radiography showed nonspecific lobar consolidation (12 cases), bulging fissure (6 cases), and air bronchogram (1 case). CT revealed air bronchogram, CT angiogram sign, bulging fissure, and fluid bronchogram in all six cases with partial bronchial obstruction (except for absence of air bronchogram in one case). CT fluid bronchograms were also present in the remaining six cases with total bronchial obstruction. Because of the lobar atelectasis, bulging fissure was absent in all six of these patients. CT angiogram signs and air bronchograms were observed in only half of the patients. CT is, therefore, very useful in detailed evaluation of postobstructive pulmonary consolidation. We particularly stress that the term "CT fluid bronchogram" should be applied when the bronchi are filled with fluid instead of air.

Adult↗
PubMedDate not supplied

CT manifestation of non-Hodgkin's lymphoma as a solitary pulmonary nodule in a patient with acquired immunodeficiency syndrome.

We present a case of acquired immunodeficiency syndrome with primary pulmonary non-Hodgkin's lymphoma that manifested as a solitary pleura-based mass lesion. Its differentiation from an infectious process imposed a diagnostic dilemma. The importance of awareness of such an entity for earlier diagnosis is stressed.

AIDS-Related Opportunistic Infections↗
PubMedDate not supplied

Computed tomography evaluation of posttraumatic pulmonary pseudocysts.

Two cases of posttraumatic pulmonary pseudocyst are reported. The characteristic thin-walled cystic lesions with air-fluid level were demonstrated in both cases by computed tomography but in only one case by conventional chest radiography. It is predicted that more such pseudocysts would be identified by using computed tomography with patients with blunt chest trauma.

Accidents, Traffic↗
PubMedDate not supplied

Unusual computed tomographic manifestations of benign metastasizing leiomyomas as cavitary nodular lesions or interstitial lung disease.

The unusual computed tomographic manifestations of benign metastasizing leiomyomas diagnosed in two patients 3 1/2 and 6 years after hysterectomy for uterine fibroids are described. One showed multiple pulmonary nodules with a round or irregular air-filled cavity representing obstructive emphysema. The other showed interstitial lung disease with tumor cells spreading along alveolar septa, the vascular wall, and the bronchial tree. We consider such metastasizing tumors as low-grade leiomyosarcomas.

Adult↗
PubMedDate not supplied

Wegener's granulomatosis upper respiratory tract and pulmonary radiographic manifestations in 30 cases with pathogenetic consideration.

Although the radiographic manifestations and pathologic features of Wegener's granulomatosis have been well described, their relationship to two variants of anti-neutrophil cytoplasmic antibodies (c- and p-ANCA) remains unclear. The purposes of this study are to analyze the radiographic and pathologic findings in 30 patients with Wegener's granulomatosis and to correlate c- and p-ANCA with such findings. Major histologic findings included parenchymal necrosis, necrotizing vasculitis, and granulomatous inflammations. Nodular lesions were more often associated with arteritis whereas patchy fluffy lesions associated with hemorrhagic capillaritis. ANCAs, particularly c-ANCA, instead of p-ANCA, were present in a high percentage of patients tested. These findings suggest that c-ANCA could play an important pathogenetic role in Wegener's granulomatosis which showed dual pathologic processes: vasculitis and granulomatous inflammation manifested radiographically as either nodular or pneumonia-like lesions, whereas p-ANCA was more often associated with patchy fluffy lung lesions as the consequence of hemorrhagic capillaritis.

Adolescent↗
PubMedDate not supplied

Clinical significance of azygos vein enlargement: radiographic recognition and etiologic analysis.

Azygos vein enlargement can be detected in congestive heart failure, portal hypertension, inferior vena cava thrombosis, right atrial mural thrombosis, a pulmonary embolism, congenital azygos continuation to the inferior vena cava, and the arteriovenous fistula. Radiography, particularly computed tomography (CT), is very useful, not only in recognition of azygos vein enlargement, but also in evaluation of its etiology for the institution of the appropriate treatment of the diseases.

Azygos Vein↗
PubMedDate not supplied

Pitfalls in CT evaluation of chest wall invasion by lung cancer.

Computed tomography in a patient with a peripheral lung cancer in the right upper lobe revealed obliteration of the extrapleural fat and direct connection of the tumor with an intercostal soft tissue mass of similar density. The findings were suggestive of chest wall invasion by the cancer which was, however, proven to be false after en bloc resection of the tumor and the contiguous chest wall. Such a diagnostic pitfall could be avoided if special attention were paid to the asymmetry of the CT image at the level of upper thoracic outlet due to improper positioning of the patient.

Adenocarcinoma↗
PubMedDate not supplied

CT evaluation of distended pericardial recess presenting as a mediastinal mass.

A patient with a remarkably distended pericardial recess due to massive pericardial effusion mimicking a mediastinal mass is reported. The nature of the "mass lesion" was clearly demonstrated by CT and the lesion disappeared after removal of the pericardial effusions. The importance and usefulness of CT in evaluation of pericardial recesses is stressed.

Aged↗
PubMedDate not supplied

Small aorta: CT detection and clinical significance.

Small aortas were documented by CT in six patients, 16-34 years old. The diameter of these aortas measured at the level of 1 cm below the orifice of the superior mesenteric artery ranged from 10 to 12 mm, much smaller than the mean of 17 mm obtained from 20 subjects, 16-20 years old. Such small aortas are usually produced by vasoconstriction as a compensatory response to hypovolemic shock.

Adolescent↗
PubMedDate not supplied

Mediastinal cystic hygromas: CT characteristics and pathogenetic consideration.

Two cases of asymptomatic primary mediastinal cystic hygroma in adults are reported. The CT findings, including: paratracheal and paravertebral location; round, smooth, and sharp outline; homogeneous density with low attenuation number; compression of surrounding tissue without gross invasion; and lack of calcification, together with the superior mediastinal location are sufficiently characteristic to suggest the diagnosis.

Adult↗