ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Previous studies using artificially induced pneumothorax and post-pneumothorax computed tomography (pCT) have shown that 100% of cancers that fall away from the mediastinum or chest wall are contained within the visceral pleura at that site. This patient demonstrates how an unintentional, postbiopsy pneumothorax can be used to show that a peripheral carcinoma of the lung does not invade the mediastinum.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Bronchioloalveolar carcinoma (BAG) is one of the few lung tumors known to demonstrate the air bronchogram sign. Production of this valuable radiologic sign by this tumor has been ascribed to an “alveolar” filling process in which tumor grows along alveolar walls with preservation of the architecture and secretes copious amounts of mucus. Thus, aerated bronchi are surrounded by alveoli that are filled with mucus and tumor. We present a case in which the air bronchogram sign and pulmonary consolidation are associated with a non-secretory BAG. Alternative mechanisms that may produce the air bronchogram sign in BAG are offered.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Benign enlargement of the thymus, termed “thymic rebound,” is a well-documented phenomenon in children. It typically follows a period of stress. Thymic rebound in an adult is not described in the literature. We present the first documented account of an adult with malignant disease who exhibited thymic rebound without chemotherapy, infection, or other obvious cause for this phenomenon.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Primary mesenchymal intrathoracic tumors are unusual. They can originate from the lung, the pleura, or the mediastinal structures. These sarcomas have protean, nonspecific imaging features. This pictorial essay illustrates a large number of these tumors, describes the plain film findings, and emphasizes the contribution of the new imaging modalities. The cross-sectional display and the high contrast resolution computed tomography (CT) and the ability to image vascular structures and chest wall with magnetic resonance (MR) allow excellent delineation of tumor extent and assessment of chest wall or vascular invasion. Early recognition of recurrence or metastases can be facilitated. In rare instances, the intrinsic characteristics of the tumor allow a specific diagnosis.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Castleman disease is a rare lymphproliferative disorder that most commonly occurs in the mediastinum. The tumor is very vascular, and biopsy is dangerous. We report magnetic resonance angiography findings, to our knowledge previously undescribed, of prominent feeding vessels; this might draw attention to the possible diagnosis and avoid inappropriate biopsy.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Relatively large tissue samples may be obtained from the lung with the “Alligator” biopsy forceps. We report the radiographic and high-resolution computed tomography (HRCT) appearances of six pulmonary lacerations in the transplanted lungs of three asymptomatic patients after transbronchial biopsy with this large caliber biopsy forceps. All patients had undergone trans-bronchial buipsy from 4 to 10 days before HRCT that was performed as part of routine surveillance after transplantation. The site and histopathologic findings of lung biopsies and negative microbiologic studies on bronchoalveolar washings correlated accurately with each pulmonary lesion seen. Laceration size varied from 9 to 20 mm (mean 14 mm) on HRCT. A thickened wall or surrounding alveolar reaction related to bronchoalveolar lavage or biopsy-induced hemorrhage was seen in five lesions. These simulated the appearance of lung abscess or invasive fungal disease. Only nonspecific alveolar opacities were noted on chest radiographs. The Alligator biopsy forceps may cause pulmonary lacerations in transplanted lungs that are detectable on HRCT but not on chest radiographs. Differentiation from opportunistic infection by CT criteria alone is difficult in these immunocompromised patients. CT studies in this population should be performed prior to transbronchial biopsy whenever possible.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

We describe the use of computed tomography (CT) in diagnosing and documenting diaphragmatic paralysis in a patient with right lung cancer that invaded the mediastinum. The patient was unable to breath hold during CT scanning, and the images were degraded by motion artifact. Motion artifact, however, was noted only in the left lung. In patients with suspected phrenic nerve dysfunction who are having chest CT for any reason, we suggest obtaining several dynamic images at the lung bases during forced exhalation. The lack of motion artifact in the lung parenchyma may be useful for diagnosing phrenic nerve injury and hemidiaphragm paralysis.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

A 21-year-old woman with a high-grade soft-tissue sarcoma developed a lesion in the soft tissues of her chest wall at the same time that she developed pulmonary metastases from her primary neoplasm. The chest wall lesion diminished in size on sequential computed tomography (CT) scans, indicating that it was a pseudometastasis caused by removal of the patient's indwelling Hickman catheter. Awareness that removal of tunneled central venous catheters can produce soft-tissue masses in the chest wall that may mimic metastases may prevent inappropriate staging and treatment of these patients.

ISSN:0883-5993    

出版商:OVID    

年代:1994

数据来源: OVID