【摘要】 目的总结5例垂体脓肿的MRI和CT表现,并复习相关文献,探讨垂体脓肿的影像学诊断和鉴别诊断。资料与方法5例垂体脓肿均经手术病理证实。5例术前均行MR平扫和增强,2例行CT平扫和增强。结果5例均表现为垂体腺增大,向鞍上突出。2例CT平扫呈低密度;3例MR平扫T1WI呈低信号,T2WI呈脑脊液样高信号,2例T1WI与脑实质信号类似,T2WI呈稍高信号。2例CT增强扫描未显示明显强化征象;5例MR增强扫描均呈环形强化,4例环壁薄且均匀,1例环壁较厚。结论环形强化是垂体脓肿的影像学表现特点,MR增强扫描显示这种环形强化比CT增强扫描更优越。更多还原

【Abstract】 Objective To investigate imaging diagnosis and differential diagnosis of pituitary abscess by analyzing CT and MRI findings of 5 cases with pituitary abscess.Materials and Methods 5 cases of pituitary abscess were all proved by operation and pathology.All cases were all examined by MR plan scan and MR contrast scan before operation,2 cases were examined by CT plan scan and CT contrast scan.Results 5 cases showed enlargement of pituitary gland,sticking out to suprasellar,and 2 cases appeared hypodensity on CT plan scan.3 cases showed hypointensity on MR T₁WI and hyperintensity which resembled cerebrospinal fluid on MR T₂WI.2 cases appeared signal like brain tissue on MR T₁WI,while on MR T₂WI showed a little hyperintensity.2 cases did not appear remarkable enhancement on CT enhancement scan,5 cases showed ring-like enhancement in MR(enhancement scan.The thickness of the ring wall showed thin and even in 4 cases and 1 case with very thick ring wall.Conclusion Ring-like enhancement is dominant imaging feature of pituitary abscess,MR contrast scan is superior to CT contrast scan in depicting ring-like feature.更多还原