Multidetector CT of thoracic aortic aneurysms.

Thoracic aortic aneurysms (TAAs) can be broadly divided into true aneurysms and false aneurysms (pseudoaneurysms). True aneurysms contain all three layers of the aortic wall (intima, media, and adventitia), whereas false aneurysms have fewer than three layers and are contained by the adventitia or periadventitial tissues. Multidetector computed tomographic (CT) angiography allows the comprehensive evaluation of TAAs in terms of morphologic features and extent, presence of thrombus, relationship to adjacent structures and branches, and signs of impending or acute rupture, and is routinely used in this setting.

Necrotizing granuloma of the lung: imaging characteristics and imaging-guided diagnosis.

Objective: The purpose of this study was to assess CT findings and the sensitivities of imaging-guided fine-needle aspiration (FNA) biopsy and core needle biopsy in the diagnosis of necrotizing granuloma of the lung.

Conclusions: The CT characteristics of necrotizing granuloma are indistinguishable from those of malignant tumors; tissue diagnosis therefore is necessary. Core needle biopsy is a sensitive method for diagnosing necrotizing granuloma of the lung, but FNA biopsy is insufficient for diagnosis.

Wandering pleuropericardial cyst.

Change in position of a chest mass is considered virtually pathognomonic of a solitary fibrous tumor of the pleura. Rarely, however, a pleuropericardial cyst may manifest as a mobile chest lesion. The computed tomography appearance and imaging characteristics of a "wandering" pleuropericardial cyst are discussed.

Surgical staple metalloptysis after apical bullectomy: a reaction to bovine pericardium?

Palliation of symptomatic emphysema may include bullous resection to improve function of the remaining lung. Buttressing staple lines with bovine pericardium partially alleviates postoperative air leak, but can promote inflammation and infection. We report a patient expectorating staples and pericardium 5 years after bilateral apical bullectomy.