CT and MRI in diagnosis of cystic lesions of sellar region / 中国医学影像技术

ABSTRACT

Objective To analyze CT and MRI characteristics of sellar cystic lesions.Methods Clinical and imaging data of 83 sellar cystic lesions were retrospectively analyzed.The location,size,number of the sac,thickness of the wall and some special signs,such as mural nodules,cavernous sinus invasion were observed.Results Totally 83 patients with sellar cystic lesions including cystic pituitary adenoma (n=33),craniopharyngioma (n=28),rathke cleft cyst (n-15),dermoid cyst (n =2),epidermoid cyst (n =2),arachnoid cyst (n =2) and pituitary abscess (n =1) were enrolled.The cystic pituitary adenoma and arachnoid cyst showed low signal on T1WI and high signal on T2WI.The signal of Rathke cleft cyst and craniopharyngioma displayed complex.Dermoid cysts,epidermoid cyst and pituitary abscess exhibited high signal on DWI.There were significant statistic differences of the size,number of the sac and the wall thickness among cystic pituitary adenomas,craniopharyngiomas and Rathke cleft cysts (all P＜0.05).Conclusion Observation of imaging features,including location,shape,signal intensity,characteristics of the capsule and some special signs can improve differential diagnosis of cystic lesion of sellar region.