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  • AIDS  (1)
  • Bilateral  (1)
  • Key words: CT – High-resolution CT – Comparative studies – Lung – Lung function – Ventilation  (1)
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  • 1
    ISSN: 1432-1084
    Keywords: Key words: CT – High-resolution CT – Comparative studies – Lung – Lung function – Ventilation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. This study was undertaken to determine prevalence, extent, and severity of focal airtrapping at expiratory high-resolution CT, and to compare focal airtrapping with age, gender, pulmonary function tests, and blood gas analysis. Two-hundred seventeen patients with and without pulmonary disease underwent paired inspiratory/expiratory high-resolution CT. Six scan pairs with corresponding scan levels were visually assessed for focal – not diffuse – airtrapping using a four-point scale. Pulmonary function tests and blood gas analysis were available for correlation in all patients (mean interval 5 days). Focal airtrapping with lower lung predominance was observed in 80 % of patients. Twenty-six of 26 patients with restrictive lung function impairment exhibited focal airtrapping (mean score 2.4), whereas only 72 of 98 (74 %) patients with obstruction did (mean score 1.5; p 〈 0.05). Fifty-eight of 70 (83 %) patients with normal lung function (mean score 1.8) and 19 of 23 (83 %) patients with mixed impairment (mean score 1.8) had focal airtrapping. Focal airtrapping showed negative correlations with static lung volumes (–0.27 to –0.37; p 〈 0.001) in all patients and moderate positive correlations with dynamic parameters (0.3–0.4; p 〈 0.001) in patients with obstruction. No significant correlations were found with age, gender, and blood gas analysis. Visual assessment of focal – not diffuse – airtrapping at expiratory high-resolution CT does not correlate with physiological evidence of obstruction as derived from pulmonary function tests since the perception of focal airtrapping requires an adequate expiratory increase in lung density.
    Type of Medium: Electronic Resource
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  • 2
    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.
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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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