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  • 1
    Digitale Medien
    Digitale Medien
    Displacement of the normal pituitary gland by sellar and juxtasellar tumours: surgical-MRI correlation and use in differential diagnosis (1994)
    Springer
    Neuroradiology 36 (1994), S. 372-375 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Pituitary adenoma ; Craniopharyngioma ; Rathke cleft cyst ; Magnetic resonance imaging ; Gadolinium DTPA ; Normal pituitary gland
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We compared the position of the normal pituitary gland as estimated by gadolinium (Gd)-DTPA-enhanced MRI, with its position at surgery in 40 patients with intra- and juxtasellar tumours: 22 pituitary adenomas, 4 craniopharyngiomas, 7 meningiomas, 2 germinomas, and 5 Rathke cleft cysts. In 37 of these, the normal gland showed more intense contrast enhancement than the adjacent tumour, from which it could be differentiated by Gd-DTPA-enhanced MRI, especially in the sagittal plane. The direction of displacement of the normal pituitary gland correlated well with tumour type, so that its position proved helpful in the differential diagnosis. The normal gland was typically displaced superiorly by pituitary adenomas, inferiorly by craniopharyngiomas, and anteriorly by germinomas. It showed variable displacement by Rathke cleft cysts, and was not usually displaced by meningiomas.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00612121
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    MRI of pituitary adenomas: the position of the normal pituitary gland (1994)
    Springer
    Neuroradiology 36 (1994), S. 295-297 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Pituitary adenoma ; Magnetic resonance imaging ; Gadolinium ; DTPA ; Normal pituitary gland
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The position of the normal pituitary gland, assessed using gadolinium-enhanced MRI was compared with the position found at surgery for pituitary adenoma in 25 patients. The tumours were five microadenomas and 20 macroadenomas. Using T1-weighted imaging, the anterior lobe could be differentiated on the sagittal image in five patients (20%) and on the coronal image in four (16%). The high intensity of the posterior lobe could be differentiated using T1-weighted sagittal imaging in 13 patients (52%). The normal pituitary gland, which enhanced more strongly than tumour, could be differentiated using Gd-DTPA-enhanced MRI on the sagittal images in 22 cases (88%) and on the coronal image in 17 (68%). In seven patients, the normal pituitary gland surrounded the tumour; it was displaced superiorly in 14 cases and superioposterorly in two but in no case was it displaced anteriorly or downwards.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00593264
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    CT scan of pituitary adenomas (1981)
    Springer
    Neuroradiology 20 (1981), S. 249-253 
    Details
    ISSN: 1432-1920
    Schlagwort(e): CT scan ; Pituitary adenomas ; Non-functioning adenomas ; PRL-secreting adenomas ; GH-secreting adenomas
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary CT scan is an extremely useful, almost harmless means of diagnosing pituitary adenomas. Growth hormone (GH)-secreting adenomas tend to have higher absorption coefficient on plain CT than the nonfunctioning and prolactin (PRL)-secreting adenomas. The absorption coefficient on contrastenhanced CT does not identify the specific type of adenoma. Ring-like enhancement was observed in five nonfunctioning and four PRL-secreting adenomas with suprasellar extension, while cystic components were observed in four nonfunctioning and four PRL-secreting adenomas. In three of ten cases of PRL-secreting microadenomas, the site corresponding to the adenoma was not enhanced, whereas the normal pituitary was. A correlation exists between the size of PRL-secreting adenoma and the serum PRL level, but not between the size of GH-secreting adenomas and the serum GH level.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00342092
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  • 4
    Digitale Medien
    Digitale Medien
    MRI of intracranial germ cell tumors (1995)
    Springer
    Neuroradiology 37 (1995), S. 32-37 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Germ cell tumour ; Magnetic resonance imaging ; Computed tomography ; Gd-DTPA
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We reviewed MRI findings in proven intracranial germ cell tumours in 22 cases, 12 of whom received Gd-DTPA. On T1-weighted images, the signal intensity of the tumour parenchyma was moderately low in 19 cases and isointense in 3; on T2-weighted images, it was high in all cases. Regions of different intensity thought to be cysts were found in 17 (77%): 7 of 12 patients with germinoma (58%) and in all other cases. Of the 13 patients with pineal lesions T1-weighted sagittal images showed the aqueduct to be obstructed in 5, stenotic in 7 and normal in 1. Strong contrast enhancement was observed in all 12 cases. Of the 14 patients with suprasellar lesions, 5 were found to have an intrasellar extension, and in 3 of these, the normal pituitary gland, which could be distinguished from the tumour, was displaced anteriorly. Ten patients (45%) had multiple lesions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00588516
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