Magnetic Resonance Imaging Assessment of Pituitary Posterior Lobe Displacement in Dogs with Pituitary-Dependent Hyperadrenocorticism

Journal of Veterinary Medical Science

Yasushi HARA⁴  Shozo OKANO¹  Hiroyuki MASUDA⁴  Yoshinori NEZU⁴  Masahiro TAGAWA⁴  Takahiro TESHIMA⁴  Takahiro TAODA¹  Akira TERAMOTO²  Hiromitsu ORIMA³ 

[1] Department of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University;Department of Neurosurgery, Nippon Medical School;Division of Veterinary Radiology, Department of Veterinary Science, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University;Division of Veterinary Surgery, Department of Veterinary Science, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University

关键词: hyperadrenocorticism;    MRI;    pituitary posterior lobe;    signal intensity;   

DOI  :  10.1292/jvms.10-0192

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(23)Cited-By(1)The displacement and signal intensity (SI) of the pituitary posterior lobe were evaluated on T1 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 T1-weighted MR images is useful for the diagnosis of pituitary adenoma. In pituitary microadenoma that presents no apparent tumorigenesis on MRI, evaluation of these values may be useful for diagnosis and selection of an appropriate therapy.

【 授权许可】

Unknown