【摘要】 目的:探讨MRI动态增强扫描(DMRI)在丰满垂体中的鉴别诊断价值。材料和方法:选取我院1999年10月~2005年4月期间具备:①垂体高径在男性超过8mm,女性超过10mm;②垂体双侧基本对称;③MRI平扫及普通增强扫描(CMRI)中垂体信号均匀,并完成DMRI检查;④有完整的临床资料为入选条件的丰满垂体共22例,回顾性分析其MRI图像资料。结果:非瘤性丰满垂体19例,其中青春期12例,流产后4例,产后1例,增强后24~48s显示以垂体结节部为中心向远侧及两侧呈渐进性、对称性弥散样强化,增强后60~72s垂体均匀强化;垂体增生2例,增强后24~72s见以垂体结节部为中心向远侧及两侧呈渐进性、对称性弥散样强化,但结节部强化程度明显高于垂体远侧部。瘤性垂体3例,均为垂体微腺瘤,增强后36~72s清晰显示垂体内局灶性低信号影。结论:DMRI可为瘤性和非瘤性丰满垂体提供有用的鉴别诊断依据。更多还原

【Abstract】 To explore the value of differential diagnosis using dynamic contrast-enhanced MR imaging(DMRI)in plumpy pituitary gland.Materials and Methods:MRI manifestations of22cases with plumpy pituitary gland were analyzed retrospectively from October1999to April2005,the inclusion criteria were:①more than8mm in the height of pituitary gland in male and more than10mm in female.②no significant differences in shape between the right and left side of pituitary stalk.③homogeneous signal intensity of pituitary gland in pre-contrast and conventional contrast MR imaging.④with integrated clinical data.Results:Of the22cases,19cases were non-tumorous plumpy pituitary gland,of which12cases were youthhood,4cases were post-abortion and one case was postpartum,the earliest contrast-enhanced structure was the pars teberalis,followed by gradual and symmetrical enhancement from pars teberalis to pars distalis and the both side of pituitary stalk at24～48seconds,homogeneous signal inˉtensity was seen at60～72seconds after administration of gadopentetate dimeglumine,2cases were hyˉperplasia of pituitary gland,the enhanced pattern was similar to the former group,but the duration of enhancement deferred at24～72seconds,and signal intensity of pars teberalis was obviously higher than of pars distalis.3cases were pituitary microadenoma,nodules with low signal intensity were clearly demonstrated at36～72seconds after administration of gadopentetate dimeglumine.Conclusion:DMRI appears to have great potentials in differentiating the tumorous and non-tumorous plumpy pituitary gland.更多还原