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  • 1
    ISSN: 1432-1084
    Keywords: Key words: Helical CT ; Dynamic MR imaging ; Kidney ; Inflammation ; AIDS ; Aspergillosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Renal insufficiency or allergic reactions for X-ray contrast agents are frequent limitations in immunocompromised hosts such as neutropenic or AIDS patients. Due to a better tolerance of contrast agents in MRI, this technique is well suited for investigation of parenchymal organs. We demonstrate an allergic AIDS patient who presented with fever and flank pain. At sonography, anechoic renal lesions were supposed to be non-complicated cysts; however, on T2-weighted MRI, the center was of high signal. Dynamic contrast-enhanced MRI of the kidneys demonstrated an enhancing rim with ill-defined margins. The lesions were supposed to be multiple bilateral abscesses. Due to the multiple dynamic contrast series, a delayed enhancement of renal parenchyma was detectable adjacent to the lesion. This was suggested as accompanying local pyelonephritis and an infectious etiology became more reliable. Aspergillus fumigatus was identified by CT-guided biopsy as the underlying microorganism. The MR appearance of this manifestation has not been described previously.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 9 (1999), S. 262-275 
    ISSN: 1432-1084
    Keywords: Key words: Pulmonary embolism ; Pulmonary arteries ; Helical CT ; MR ; Vascular studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Acute pulmonary embolism is a frequent disease with non-specific findings, high mortality, and multiple therapeutic options. A definitive diagnosis must be established by accurate, non-invasive, easily performed, cost-effective, and widely available imaging modalities. Conventional diagnostic strategies have relied on ventilation-perfusion scintigraphy complemented by venous imaging. If the results are inconclusive, pulmonary angiography, which is regarded as the gold standard, is to be performed. Recently, marked improvements in CT and MRI and shortcomings of scintigraphy led to an update of the diagnostic strategy. Spiral CT is successfully employed as a second-line procedure to clarify indeterminate scintigraphic results avoiding pulmonary angiography. It can also be used as a first-line screening tool if service and expertise is provided. Venous imaging is indicated if CT is inconclusive. The MRI technique can be applied as an alternative second-line test if spiral CT is not available or is contraindicated. It has the greatest potential for further developments and refinements. Echocardiography should be used as a first-line bedside examination in critical patients. If inconclusive stabilized patients undergo spiral CT, unstable patients should be referred for pulmonary angiography. Chronic thromboembolic pulmonary hypertension is a rare sequela of acute pulmonary embolism which can be cured surgically. Morphology, complications, and differential diagnoses are better illustrated by spiral CT and MRA, whereas invasive acquisition of hemodynamic data is the sole advantage of angiography.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Der Chirurg 70 (1999), S. 1357-1360 
    ISSN: 1433-0385
    Keywords: Key words: Elastofibroma dorsi ; Bilateral ; Literature review. ; Schlüsselwörter: Elastofibroma dorsi ; bilateral ; Literaturübersicht.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. Ein 75 jähriger Patient stellte sich mit seit 2 Jahren langsam größenprogredienten Raumforderungen unterhalb beider Schulterblätter vor. Anamnestisch bestand ein Zustand nach proximaler Oberarmamputation linksseitig mit folgender prothetischer Versorgung. Klinisch zeigten sich direkt unter den Schulterblattspitzen beidseits 2 faustgroße Tumoren, die fest mit dem tiefer gelegenen Gewebe verwachsen waren. Sowohl magnetresonanztomographisch als auch intraoperativ stellte sich ein infiltratives Wachstum dieser Raumforderungen in die seitliche Thoraxmuskulatur und das Periost der Rippen sowie des Schulterblatts dar, so daß ein maligner Tumor vermutet wurde. Histopathologisch zeigte sich Bindegewebe mit zahlreichen eingelagerten fragmentierten und unregelmäßig konfigurierten elastischen Fasern und unscharfer Begrenzung zum umgebenden Fettgewebe, typisch für ein Elastofibrom. Für Malignität bestand kein Anhalt. Im vorliegenden Fall erscheint es wahrscheinlich, daß eine unphysiologische Belastung der oberen Extremitäten bei dem mit einer linksseitigen Oberarmprothese versorgten Patienten die Entstehung der beidseitigen Elastofibrome begünstigt hat. Das Elastofibrom ist ein seltener, gutartiger, fast immer subscapulär gelegener Weichteiltumor, der bevorzugt bei älteren Frauen auftritt. In etwa 10 % der Fälle findet sich ein bilaterales, meist asynchrones Wachstum. Klinisch und radiologisch stellen Lipome sowie Weichteilsarkome die wichtigsten Differentialdiagnosen dar. Andere seltene Elastofibromlokalisationen an Rumpf, Kopf und Extremitäten werden in der vorliegenden Arbeit aufgeführt.
    Notes: Summary. A 75-year-old man had painless, slowly enlarging tumors in the right and left infrascapular regions. Clinically, the tumors were nontender and semimobile. MR imaging and the operative exploration revealed tumors infiltrating the lateral thoracic muscles and periost of the scapula and underlying ribs. At surgery, the tumors were thought to be malignant, most likely liposarcomas. The histological examination showed the characteristic appearance of elastofibromas with spindle-shaped fibroblasts, which were separated by thick eosinophilic collagenous and elastic fibers. Elastofibromas are benign mesenchymal soft-tissue lesions that mainly affect elderly women. In 10 % of the patients bilateral, often asynchronous tumors are seen. Ninety-nine percent of the lesions are located in the subscapular region. Occasional elastofibromas have been described in the extremities, head, and in the abdominal and thoracic cavities.
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