veoexrmpzt
Dołączył: 21 Lut 2011
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Skąd: England
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 Wysłany: Wto 7:44, 15 Mar 2011 Temat postu: adidas scarpe mdn exk ecdn gjk |
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Low-field MRI in the diagnosis of pituitary adenoma Application
Differences, young women especially during pregnancy for a pituitary height of up to 9mm 10ram, so the height of the gland to increase the diagnosis of pituitary limited value. The diagnosis must be combined with the upper edge of the pituitary is eminence, especially in local or unilateral carina more meaningful. Pituitary stalk is the main indirect offset signs l6J, normal pituitary stalk is centered in the coronal, when a pituitary adenoma, due to mass effect or shift carina Erzhi pituitary stalk. If one side pituitary microadenoma, pituitary stalk is usually the lower part of the shift to the uninjured side. However. If the low signal and the side of the pituitary without the limitations of upper and lower bulge, this time offset pituitary stalk appears, still has a diagnosis. If the margin of the pituitary are straight up and down, height not more than 7mm, the pituitary is no low signal, when the pituitary stalk deviation does not have diagnostic value. But when the pituitary showed multiple foci, or was flat, located in the midline or just the end of the middle close to the saddle. Pituitary stalk displacement does not occur often. Some cases,[link widoczny dla zalogowanych], large adenoma, pituitary stalk but no significant shift. Therefore, no pituitary stalk displacement and can not rule out pituitary adenoma. Pituitary stalk slight shift,[link widoczny dla zalogowanych], especially in the upper pituitary stalk displacement and does not necessarily have lesions, to exclude the possibility of normal variation. TIWI pituitary abnormal low signal within the pituitary was significantly up on the edge of conflict, or asymmetry differences over 1.5ram or 2mm or more, accompanied by the limitations of the pituitary stalk deviation, or trapped underneath the saddle (this is the end of adenoma of the saddle caused by erosion) can be diagnosed as pituitary adenoma; while 20 * no abnormal signal was so low signals, but on the edge of the central pituitary pituitary stalk resulted in significantly shorter bulging, with significantly higher prolactin radioimmunoassay check, menopausal history, also diagnosed as pituitary adenoma. When the tumor showed such signals, the gland height> 8ram pituitary adenoma should be considered when possible, the same time, for this type of attention and adolescents should be differentiated from the normal pituitary, the main method of identification of clinical symptoms and pituitary in addition to endocrine biochemical screening, the need for enhanced MRI scan. Enhanced MRI scan can increase the normal pituitary adenoma tissues and micro-contrast and improve the detection rate _7J, is generally believed that the blood supply to the pituitary and pituitary adenomas from the same secondary portal plexus _8J, but the tumor blood vessels permeability of macromolecules and blood vessels are different in normal pituitary, therefore, enhance the signal lower than the normal pituitary tumors early, so early in our hospital with rapidly increasing scanning. 90% of the patients in this group showed low signal, of which 6 cases were plain signal, unclear boundaries with the normal gland, injection GD. DTPA later. Contrasting the two. 3 cases were enhanced significantly enhanced compared with normal pituitary, direct blood supply from the carotid artery may [lead. Enhanced lesions in this group increased 11% detection rate,[link widoczny dla zalogowanych], it is of great value enhanced scan. In conclusion, MRI can be a good show pituitary location,[link widoczny dla zalogowanych], shape and size, and the normal pituitary,[link widoczny dla zalogowanych], pituitary stalk, optic chiasm, and the relationship between carotid artery has become a routine inspection of micro adenoma, the clinical use of stereotactic radiotherapy for (Gamma Knife, x. knife), or the choice of surgical approach. Strive to achieve a good therapeutic effect of great value.
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