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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic resonance imaging of localized giant cell tumour of the tendon sheath (MRI of localized GCTTS) (1997)
    Springer
    European radiology 7 (1997), S. 198-201 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Tendons ; Soft tissue neoplasms ; MRI ; Gadolinium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The objective of this study was to evaluate the appearance of localized giant cell tumour of the tendon sheath (GCTTS) on unenhanced and Gd-enhanced MR images. MR images of 13 histologically proven cases of localized GCTTS were evaluated for mean size, location, homogeneity and signal intensity (SI) on both T1- and T2-weighted images, and enhancement pattern. All lesions except 1 affected young adults. On T1- and T2-weighted images, lesions showed predominantly low SI equal to or slightly higher than skeletal muscle. On Gd-enhanced T1-weighted images, strong homogeneous enhancement was seen. These findings reflect the underlying histological composition of the lesion; haemosiderin deposition in xanthoma cells, shortening T2-relaxation time, and abundant collagenous proliferation are responsible for low SI on T1- and T2-weighted images. Strong homogeneous enhancement originates from numerous proliferative capillaries in the collagenous stroma. We conclude that these characteristic MR features, together with clinical information, are a valuable diagnostic tool in offering a correct preoperative diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050134
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  • 2
    Electronic Resource
    Electronic Resource
    Cervical chordoma with vertebral artery encasement mimicking neurofibroma: MRI findings (2000)
    Springer
    European radiology 10 (2000), S. 967-969 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Spine – Neoplasm – Chordoma – MR imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. A case of cervical chordoma in a 36-year-old white man with hypoesthesia in the neck and right shoulder, neck pain, and restricted neck mobility is presented. Plain radiographs of the cervical spine showed radiolucency of the body of C2 on the right side and enlargement of the right intervertebral foramen at C2–C3 level. Tumor encasement of the vertebral artery was demonstrated by MR imaging and confirmed by conventional arteriography. This proved to be particularly important for preoperative assessment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300051046
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Widening of the spinal canal and dural ectasia in Marfan's syndrome: assessment by CT (1999)
    Springer
    Neuroradiology 41 (1999), S. 850-854 
    Details
    ISSN: 1432-1920
    Keywords: Key words Marfan's syndrome ; Ehlers-Danlos syndrome ; spinal canal ; Ectasia dural ; computed tomography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We describe a method for diagnosing dural ectasia (DE) and spinal canal widening (SCW) using CT. We examined 23 patients with Marfan's syndrome (MFS), 17 with Ehlers-Danlos syndrome (EDS) and 29 normal subjects, using six axial slices at the level of the L1-S1 pedicles. Transverse diameters of the vertebral bodies, spinal canal and dural sac were measured and indices were defined to differentiate patients with DE and SCW from normal. Statistical significance was assessed using Student's t -test, χ 2-test and Pearson's correlation coefficient. DE and SCW occurred in 69.6 % and 60.9 % of cases of MFS and in 23.5 % and 35.3 % of EDS respectively. In MFS, prevalence was significantly higher than in the control group. DE was significantly more frequent in MFS than in EDS. A strong correlation existed between DE and SCW in MFS and the control group, but not in EDS. Our system enables quantitative assessment of SCW and DE. The latter is particularly important in subjects suspected of having MFS, in whom it is a common and characteristic sign.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002340050856
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  • 4
    Electronic Resource
    Electronic Resource
    Traumatic lumbosacral nerve root meningoceles (1989)
    Springer
    Neuroradiology 31 (1989), S. 425-429 
    Details
    ISSN: 1432-1920
    Keywords: Nerve root avulsion ; Traumatic meningocele ; CT ; Myelography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of traumatic lumbar meningoceles at four levels in combination with total and partial nerve root avulsion and with perservation of a nerve root is reported. Several diagnostic imaging techniques (myelography, CT, myelo-CT and MRI) are compared and their value in demonstrating the continuity of the nerve roots is discussed. MRI could assess the continuity of a nerve root in a traumatic meningocele, not demonstrable by myelography or myelo-CT. The combination of myelography, myelo-CT and MRI is likely to provide a complete diagnostic evaluation of nerve root lesions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00343868
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  • 5
    Electronic Resource
    Electronic Resource
    MR imaging of clear cell sarcoma (malignant melanoma of the soft parts): a multicenter correlative MRI-pathology study of 21 cases and literature review (2000)
    Springer
    Skeletal radiology 29 (2000), S. 187-195 
    Details
    ISSN: 1432-2161
    Keywords: Key words Clear cell sarcoma ; Malignant melanoma of soft parts ; MRI ; Magnetic resonance ; Neoplasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To evaluate MR imaging and pathology findings in order to define the characteristic features of clear cell sarcoma of the soft tissues (malignant melanoma of the soft parts). Design and patients. MR examinations of 21 patients with histologically proven clear cell sarcoma of the musculoskeletal system were retrospectively reviewed and assessed for shape, homogeneity, delineation, signal intensities on T1- and T2-weighted images, contrast enhancement, relationship with adjacent fascia or tendon, secondary bone involvement, and intratumoral necrosis. In 19 cases the pathology findings were available for review and for a comparative MR-pathology study. Results. On T1-weighted images, lesions were isointense (n=3), hypointense (n=7) or slightly hyperintense to muscle (n=11). Immunohistochemical examination was performed in 17 patients. All 17 specimens showed positivity for HMB-45 antibody. In nine of 11 lesions with slightly increased signal intensity on T1-weighted images, a correlative MR imaging-pathology study was possible. All nine were positive to HMB-45 antibody. Conclusions. Clear cell sarcoma of the musculoskeletal system often has a benign-looking appearance on MR images. In up to 52% of patients, this lesion with melanocytic differentiation has slightly increased signal intensity on T1-weighted images compared with muscle. As the presence of this relative higher signal intensity on T1-weighted images is rather specific for tumors displaying melanocytic differentiation, radiologists should familiarize themselves with this rare entity and include it in their differential diagnosis when confronted with a well-defined, homogeneous, strongly enhancing mass with slightly higher signal intensity compared with muscle on native T1-weighted images.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560050592
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Evaluation of the involvement of axial entheses and sacroiliac joints in relation to diagnosis: Comparison among diffuse idiopathic skeletal hyperostostis (DISH), osteoarthrosis and ankylosing spondylitis (1992)
    Springer
    Clinical rheumatology 11 (1992), S. 551-557 
    Details
    ISSN: 1434-9949
    Keywords: Diffuse Idiopathic Skeletal Hyperostosis (DISH) ; Osteoarthrosis ; Ankylosing Spondylitis ; Enthesis ; Enthesiophyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Since diffuse idiopathic skeletal hyperostosis (DISH) is frequently difficult to differentiate radiologically from the axial involvement of ankylosing spondylitis and osteoarthrosis, some features of these 3 different diseases were compared. The predominantly horizontal nature of the enthesiophyte in DISH and its right preponderance in the thoracic region were demonstrated. This right preponderance was due to the presence of the thoracic aorta located in the left thoracic side. A midthoracic notch was described in DISH which seemed to be confined to noninflammatory conditions, but was not found in ankylosing spondylitis. The importance of sacroiliac computerized tomography to differentiate sacroiliac joint abnormalities associated with DISH from the sacroiliitis of spondylarthropathies was stressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02283118
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