作者报告24例垂体微腺瘤,均经手术及组织学确诊。术前均有MRI及CT检查。女21例,男3例。年龄12～55岁。其中17例为催乳激素瘤,7例为ACTH腺瘤。18例术前诊断经手术证实准确。6例术前诊断及定位错误。18例确诊者MRI较CT敏感,计MR及CT均不能区分肿瘤边界者4例,MR可区分者14例其中4例CT不能区分,两法均可区 The authors reported 24 cases of pituitary microadenomas, which were confirmed by surgery and histology. Preoperative MRI and CT examination. There were 21 females and 3 males. Age 12 to 55 years old. Of these, 17 were prolactinomas and 7 were ACTH adenomas. 18 cases of preoperative diagnosis confirmed by surgery. 6 cases of preoperative diagnosis and positioning error. Eighteen patients diagnosed with MRI were more sensitive than CT, and MR and CT could not distinguish between 4 tumors at the tumor boundary. MR can be distinguished from 14 patients. 4 of them could not be differentiated by CT.