目的 研究55例垂体腺瘤的临床病理特点。方法 应用MRI及免疫组织化学法观察垂体腺瘤。结果 MRI显示微腺瘤31例,大腺瘤24例;免疫组织化学法标记分类,各种激素型腺瘤42例,无激素型腺瘤13例。结论大垂体腺瘤潜在恶性与复发有关,而与垂体腺瘤激素类型无关。 Objective To study the clinicopathological features of 55 cases of pituitary adenoma. Methods MRI and immunohistochemistry were used to observe the pituitary adenoma. Results MRI showed that there were 31 cases of microadenomas and 24 cases of large adenomas. There were 42 cases of various hormone-type adenomas and 13 cases of hormone-free adenomas by immunohistochemistry. Conclusions The potential malignancy of pituitary adenomas is related to relapse, but not to the hormone type of pituitary adenomas.