T_2暗影征和暗点征在卵巢内膜囊肿、出血性非内膜囊肿和非出血性囊性病变鉴别诊断中的价值

The value of T_2 shading and T_2 dark spot sign in the differential diagnosis of ovarian endometrial cysts,other hemorrhagic cysts and non-hemorrhagic cystic lesions

目的:探讨T2暗影征和T2暗点征在卵巢内膜囊肿、出血性非内膜囊肿和非出血性囊性病变的鉴别诊断中的价值。方法:对67例卵巢内膜囊肿、12例出血性非内膜囊肿和33例非出血性囊性病变进行MRI分析,分别计算T2暗影征和T2暗点征在鉴别诊断这3组疾病时的敏感度、特异度和准确度。结果:T2暗影征在卵巢内膜囊肿和出血性非内膜囊肿、出血性囊肿和非出血性囊性病变的鉴别诊断中的敏感度、特异度和准确度分别为87.95%、75.00%、86.32%和80.00%、100%、85.16%。T2暗点征(Ⅰ)在鉴别诊断卵巢内膜囊肿和出血性非内膜囊肿中的敏感度、特异度、准确度为25.30%、100%、34.74%。结论:T2暗影征在卵巢内膜囊肿和出血性非内膜囊肿鉴别诊断中具有较高的敏感度,但仅有中度特异度;T2暗影征在卵巢出血性和非出血性囊性病变的鉴别中具有较高的敏感度和极高的特异度,可能是出血性囊肿的特征性表现;T2暗点征(Ⅰ)在鉴别这两组疾病时虽然敏感度不高,但具有极高的特异度,可能是卵巢内膜囊肿的特征性MR表现。

Objective： To assess the value of T2 shading and T2 dark spot sign in the differential diagnosis of ovarian en- dometrial cysts, other hemorrhagic cysts and ovarian non-hemorrhagic cystic lesions. Methods： The sensitivity, specificity and accuracy of T2 shading and T2 dark spot sign in differentiating these 3 kinds of diseases were calculated through a MRI study of ovarian endometrial cysts in 67 patients, other hemorrhagic cysts in 12 patients and ovarian non-hemorrhagic cystic lesions in 33 patients. Results： The sensitivity, specificity and accuracy of T2 shading in distinguishing ovarian endometrial cysts from other hemorrhagic cysts and ovarian hemorrhagic cysts from non-hemorrhagic cystic lesions were 87.95%, 75.00%, 86.32% and 80.00%, 100%, 85.16% respectively. The sensitivity, specificity and accuracy of T2 dark spot sign（ Ⅰ ） in discriminating ovarian endometrial cysts and other hemorrhagic cysts were 25.30%, 100%, 34.74%. Conclusions： T2 shading has high sensitivity but only moderate specificity in the differential diagnosis of ovarian endometrial cysts and other hemorrhagic cysts. T2 shading has relatively high sensitivity and extremely high specificity in discriminating ovarian hemorrhagic cysts from non-hemorrhagic cys- tic lesions and may be the characteristic feature of the former lesions. Though with low sensitivity, T2 dark spot sign （Ⅰ） has extremely high specificity in differentiating ovarian endometrial cysts from other hemorrhagic cysts and may be the characteris- tic feature of ovarian endometrial cysts.