垂体瘤MR信号强度与组织类型的关系

目的：探讨垂体瘤MR信号强度与组织类型的关系。方法：回顾性分析了167例垂体瘤的MR图像，其中生长激素腺瘤20例，泌乳素腺瘤114例，非分泌性腺瘤30例，促肾上腺皮质激素腺瘤2例，促甲状腺激素腺瘤1例。分析了垂体瘤MR信号强度及其均匀性与组织类型的关系。结果：垂体瘤MR信号强度与组织类型有关，生长激素腺瘤T1WI及T2WI常呈等信号 (63.6%，69.2%)，泌乳素大腺瘤T1WI呈低、稍低及等信号(20.8%, 16.9%, 45.3%)，T2WI呈稍高、高信号(74%, 14%)；PRL微腺瘤T1WI多呈低(22.2%)及稍低信号(70.8%)，T2WI为稍高(30.6%)及高信号(56.9%)；非分泌大腺瘤T1WI多呈低、稍低及等信号(17.6%, 14.7%, 55.9%)，T2WI为稍高、高信号(61.8%, 32.4%)。肿瘤出血多见于生长激素腺瘤(22.2%)及泌乳素腺瘤　　　　(21.4%)。结论：MR信号强度可区分垂体瘤的组织类型；肿瘤出血多见于分泌性腺瘤。

The relationship with MR signal intensity and histological types of pituitary adenomas

Objective: To investigate the relationship with MR signal intensity and histological types of pituitary adenomas. Methods: MR images of 167 patients with pituitary adenomas including 20 growth hormone (GH) adenomas, 114 prolactin (PRL) adenomas, 30 non-secretory adenomas, 2 adrenocorticotropic hormone (ACTH) adenomas and 1 thyroid-stimulating hormone (TSH) adenoma were reviewed retrospectively. The relationship between MR signal intensity and homogeneousness with histological types of pituitary adenomas were analysed. Results: MR signal intensity was correlative with histological types of adenoma. GH adenomas were usually equally intense (63.6%, 69.2%) in T1WI and T2WI; PRL macroadenomas were less, slightly less, or equally intense less (20.8%, 16.9%, 45.3%) in T1WI and slightly more or more intense (74%, 14%) in T2WI; PRL microadenomas were less, slightly less or equally intense (22.2%,70.8%) in T1WI and slightly more or more intense (30.6%, 56.9%) in T2WI; non-secretory adenomas were less, slightly less, or equally intense (17.6%, 14.7%, 55.9%) in T1WI and slightly more or more intense (61.8%, 32.4%) in T2WI. Hemorrhage of adenomas was mostly found in GH adenomas (22.2%) and PRL adenomas (21.4%). Conclusion: The distinguished histological types of adenomas can be differentiated by MR signal intensity; hemorrhage of adenomas is mostly found in secretory adenomas.