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  • 1
    Electronic Resource
    Electronic Resource
    Regional bone changes in deep soft tissue hemangiomas: radiographic and MR features (1998)
    Springer
    Skeletal radiology 27 (1998), S. 205-210 
    Details
    ISSN: 1432-2161
    Keywords: Key words Soft tissue hemangioma ; Plain films ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To evaluate changes in bone adjacent to deep soft tissue hemangiomas of the extremities. Design and patients. We retrospectively reviewed the plain films of 115 patients with histologically proven deep soft tissue hemangiomas of the extremities. The length and pattern of the bone changes were analyzed and correlated with the MRI examination (n=55) and surgical findings. Results. Plain film studies demonstrated reactive bone changes adjacent to the deep soft tissue hemangiomas in 24 (21%) patients and phleboliths in 23 (20%) patients. The results of plain film analysis revealed a wide spectrum of regional bone changes adjacent to the hemangiomas, including periosteal reactions (16%), regional osteopenia (1%), cortical erosion (3%), bony overgrowth (3%), coarsening of the trabeculae (5%), and a combination of the above changes (4%). The length of the reactive changes corresponded approximately to the size of the hemangioma in 70% and was longer than the largest dimension of the hemangioma in 30%. Of the 55 patients studied with MRI, 39 (71%) patients had normal bones and 16 (29%) had bone changes. Conclusion. Deep soft tissue hemangiomas may cause changes in adjacent bones. Familiarity with the pattern of reactive bone changes may help to avoid misdiagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560050366
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Vascular Complications in Lumbar Spinal Surgery: Percutaneous Endovascular Treatment (2000)
    Springer
    CardioVascular & interventional radiology 23 (2000), S. 65-69 
    Details
    ISSN: 1432-086X
    Keywords: Key words: Spine, surgery—Surgery, complications—Arteries, injuries—Fistula, arteriovenous—Grafts, interventional procedure—Embolism, therapeutic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Four patients underwent endovascular treatment of vascular injuries complicating lumbar spinal surgery. In two patients with massive retroperitoneal hemorrhage, the extravasating lumbar arteries were successfully embolized with microcoils. Two patients with large iliac arteriovenous fistula (AVF) were treated, one with embolization using a detachable balloon and coils, which failed, and the other with placement of a stent graft after embolization of distal runoff vessels, which occluded the fistula. We conclude that acute arterial laceration or delayed AVF complicating lumbar spinal surgery can be managed effectively with selective embolization or stent-graft placement, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002709910012
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Peripheral focal low signal intensity areas in the degenerated annulus fibrosus on T2-weighted fast spin echo MR images: correlation with macroscopic and microscopic findings in elderly cadavers (1999)
    Springer
    Skeletal radiology 28 (1999), S. 209-214 
    Details
    ISSN: 1432-2161
    Keywords: Key words Spine ; intervertebral disks ; Spine ; magnetic resonance studies ; Spine ; diseases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To correlate the peripheral focal low signal intensity areas in the degenerated annulus fibrosus on T2-weighted fast spin echo MR images with the macroscopic and microscopic findings in cadavers derived from elderly subjects. Design. Twenty-eight intervertebral disks (16 lumbar and 12 cervical) derived from four nonembalmed cadavers were examined with T1-weighted spin echo and proton density-weighted and T2-weighted fast spin echo MR imaging. The signal intensities of the annulus fibrosus were evaluated on sagittal MR images and correlated with the findings on corresponding sagittal anatomic sections. The MR imaging-histologic correlation was then studied. Results. Peripheral focal low signal intensity areas and adjacent regions of high signal intensity were found in five lumbar intervertebral disks. Peripheral focal low signal intensity regions consisted of disorganized compact annular fibers, tiny fissures, and dense fibrosis. The high signal intensity regions, adjacent to the areas of low signal intensity, consisted of mucoid degeneration, tiny fissures, and chondroid metaplasia. Conclusions. Awareness of the histologic findings in regions that reveal peripheral focal low signal intensity with adjacent regions of high signal intensity in the degenerated annulus fibrosus on T2-weighted images may facilitate effective interpretation of clinical MR images of the spine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560050502
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Intramuscular vascular malformations of an extremity: findings on MR imaging and pathologic correlation (1999)
    Springer
    Skeletal radiology 28 (1999), S. 515-521 
    Details
    ISSN: 1432-2161
    Keywords: Key words Congenital vascular malformation ; Extremity ; MR imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To analyze the findings of intramuscular vascular malformations of an extremity on MR imaging and to correlate these findings with histopathologic examination. Design and patients. The findings on MR imaging and the medical records of 14 patients with an intramuscular vascular malformation of the extremity were retrospectively studied. All patients underwent surgical excision. Diagnoses were based on the results of pathologic examination. Findings on MR imaging were noted and correlated with the histopathologic findings. Results. Intramuscular vascular malformations of an extremity showed multi-septate, honeycomb, or mixed appearance on MR imaging. Multi-septate areas correlated with dilated and communicating vascular spaces with flattened endothelium. Honeycomb areas corresponded to vascular spaces with inconspicuous small lumina and thickened vascular walls. Areas of increased signal intensity on T2-weighted images were found in all intramuscular vascular malformations. Infiltrative margins were more commonly seen in intramuscular lymphaticovenous malformations. Adherence to neurovascular structures and orientation of the lesion along the long axis of the affected muscle were more commonly seen in intramuscular venous malformations. Conclusions. Intramuscular vascular malformations showed either a multi-septate, honeycomb, or mixed appearance, reflecting the size of the vascular spaces and the thickness of the smooth muscles of the vessel walls. Prediction of the subtype of an intramuscular vascular malformation of an extremity on MR imaging seems to be difficult, although there are associated findings that may be helpful in the differential diagnosis of each subtype.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560050555
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    Paper (German National Licenses)
    Fulltext
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