AJR. American journal of roentgenology
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Tarsometatarsal (Lisfranc) fracture-dislocations can be very difficult to recognize radiographically. The evaluation of the Lisfranc joint can be simplified by meticulously studying the alignment of the metatarsal bases with their corresponding tarsal bones. The usefulness of this observation has been confirmed by: anatomic descriptions, biomechanical analysis, and clinical foot radiographs. Subtle abnormalities identified at the Lisfranc joint using this observation included: metatarsal subluxations identified only on a single projection, associated tarsal subluxations and dislocations, irreducible metatarsal subluxations after closed manipulation, and recurrent metatarsal subluxations after reduction.
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Rupture of the posterior urethra is an uncommon but serious complication of anterior pelvic arch fracture. It is commonly believed that such injuries occur at the apex of the prostate and on urethrography result in extravasation of contrast material above the urogenital diaphragm. In 1977, Colapinto and McCallum proposed a different classification of such injuries. ⋯ The data support the contention that the traditional concept of posterior urethral injury is, in fact, unusual. Of 18 patients, 12 had complete or partial urethral injuries extending both above and below the urogenital diaphragm as demonstrated by urethrography. Only three of 18 patients had the classical injury, that is, extravasation into pelvic fascial planes limited inferiorly by an intact urogenital diaphragm.
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AJR Am J Roentgenol · Aug 1981
Comparative StudyIntracranial hemorrhage in premature infants: accuracy in sonographic evaluation.
The real-time high resolution mechanical sonographic sector scanner is a convenient and useful instrument for the detection of intracranial hemorrhage in premature infants. Experience with 27 infants with intracranial hemorrhage detected by sonography and confirmed by computed tomography (CT) or by autopsy is analyzed. The severity of the hemorrhage shown by those methods was graded by an accepted classification for standardized reporting. ⋯ From this experience the authors believe sonographic sector scanning should be the initial examination in all infants at high risk for intracranial hemorrhage. When the ventricles are of normal size, CT scanning is recommended to search for small intraventricular hemorrhage that may not be detected by sonography. For subarachnoid bleeding, CT is preferable to sonography.
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Computed tomographic (CT) scans of 11 patients with an azygos lobe were compared with similar scans of age- and gender-matched normal controls. The reflections of the right lung against the superior mediastinum were evaluated, and particular attention was directed to five specific areas: the azygos vein and arch, the superior vena cava, the pretracheal and retrotracheal areas, and the esophagus. ⋯ The azygos lobe intrudes into the pretracheal and retrotracheal mediastinum contacting the anterior wall of the trachea, the medial wall of the superior vena cava, and most of the posterior wall of the trachea in the majority of patients. The presence of an azygos lobe significantly alters the contour of the right mediastinum and changes the relation of lung to the superior vena cava and trachea.