Journal of computer assisted tomography
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J Comput Assist Tomogr · Sep 1985
Case ReportsCT demonstration of tethering of the lung by the pulmonary ligament.
An unusual form of atelectasis has been detected on CT of a patient with large pleural effusions. It has been interpreted to be the result of tethering of the lungs to the mediastinum by the pulmonary ligaments, which may have lacked normal elasticity in this case because of prior irradiation. This appearance may simulate a collection of dense material on the surface of an effusion when there is no obvious air bronchogram present.
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Tracheal bronchus is an uncommon anomaly in which an ectopic bronchus arises from the trachea above the carina. It occurs on the right side and two types are described: "supernumerary," which is associated with a normal trifurcating right upper lobe bronchus, and "displaced," in which instance the ectopic bronchus supplies the apical segment of the upper lobe. ⋯ Findings include identification of a bronchus arising from the trachea in a section more cephalad than the carina and the presence of only two segmental bronchi arising from the anatomic right upper lobe bronchus when the anomaly is of the "displaced" type. Thin axial sections and coronal imaging display the tracheal bronchus to best advantage.
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The limitations of routine radiography of the feet in demonstrating tarsal coalitions are well known. Even with the use of multiple projections of the foot, tarsal coalitions may escape detection. ⋯ Results of these examinations suggest the longitudinal projection to be most helpful in demonstrating talonavicular coalitions and the axial projection in demonstrating talocalcaneal coalitions. The history, pathology, and other imaging modalities of tarsal coalitions are reviewed.