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目的分析卵巢卵泡膜细胞瘤的 MRI 表现特点并与病理结果进行对照,以提高对卵巢肿瘤的认识和诊断水平。方法分析19例经病理证实的卵泡膜细胞瘤患者的 MRI 资料,观察病灶的形态特征、信号强度并与病理形态学表现进行对照。对病灶大小与腹水量的关系进行相关分析。结果 MR 平扫病灶实体 T_1WI 表现为等低信号,T_2WI 多表现为低信号,发生囊变表现为高信号,部分病灶内可出现纤维分隔;增强后早期病灶多为轻度均匀强化,延迟后强化程度略增加。术后9例病理所见坏死、囊性变与 MRI 上囊变信号灶的数目、形态基本一致。15例肿瘤细胞之间有较明显的胶原纤维,MRI 上病灶实体均表现为 T_2WI 显著低信号;另4例光学显微镜下胶原纤维相对较少,瘤细胞比例相对较高,T_2WI 上病灶实体表现为中等信号。腹水量的多少与病灶大小无相关性(r=0.43,P=0.10)。结论卵泡膜细胞瘤 T_2WI 低信号的特征及乏血供的增强模式能够较准确反映卵泡膜细胞瘤的病理特点,对该肿瘤的诊断具有一定的特异性,有助于该病的诊断及鉴别诊断。
Objective To analyze the MRI features of ovarian ameloblastoma and to compare with the pathological findings to improve the understanding and diagnosis of ovarian tumors. Methods MRI data of 19 cases of patients with ornocystoma confirmed by pathology were analyzed. Morphological characteristics and signal intensity of the lesions were observed and compared with pathological findings. The correlation between lesion size and ascites volume was analyzed. Results T_1WI of MR plain lesions showed low signal intensity, T_2WI mostly showed low signal intensity, and cystic lesions showed high signal intensity. Fibrous segregation occurred in some lesions. In the early stage of enhancement, the lesion was mostly mild and even delayed The degree of increase slightly. Nine cases of pathological findings of necrosis, cystic degeneration and MRI on the number of cystic lesions, morphology basically the same. 15 cases of tumor cells between the more obvious collagen fibers, MRI lesions showed T_2WI lesions were significantly low signal; the other 4 cases under the optical microscope relatively few collagen fibers, the proportion of tumor cells is relatively high, T 2WI lesions on the performance of the entity Medium signal. There was no correlation between the amount of ascites and the size of the lesion (r = 0.43, P = 0.10). Conclusions The characteristics of low signal intensity of T 2 WI and the enhancement mode of lack of supply of blood supply in theciliary cell tumor can accurately reflect the pathological features of the theca cell tumor and have a certain specificity for the diagnosis of the tumor and contribute to the diagnosis and differential diagnosis of the disease .