期刊
JOURNAL OF VETERINARY MEDICAL SCIENCE
卷 73, 期 6, 页码 725-731出版社
JAPAN SOC VET SCI
DOI: 10.1292/jvms.10-0192
关键词
hyperadrenocorticism; MRI; pituitary posterior lobe; signal intensity
资金
- Grants-in-Aid for Scientific Research [21580394] Funding Source: KAKEN
The displacement and signal intensity (SI) of the pituitary posterior lobe were evaluated on TI weighted magnetic resonance (MR) images in 28 dogs with pituitary dependent hyperadrenocorticism (PDH). Compared with normal dogs, the posterior lobe was displaced dorsally in the pituitary of the PDH dogs. Correlation between the pituitary height/brain area (P/B) ratio and the displacement of the posterior lobe in the PDH dogs suggests that dorsal displacement of the posterior lobe increases in accordance with enlargement of the pituitary. As to the SI of the posterior lobe, the PDH dogs showed significantly lower SI in comparison to the normal dogs. Taken together, these results suggest that assessment of the displacement and SI of the posterior lobe of the pituitary on TI-weighted MR images is useful for the diagnosis of pituitary adenoma. In pituitary microadenoma that presents no apparent tumorigenesis on M RI, evaluation of these values may be useful for diagnosis and selection of an appropriate therapy.
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