MR imaging features of vaginal malignancies
MR imaging features of vaginal malignancies
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DOI：
10.1148/rg.281075065
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发表时间：
2008-01-01
期刊：
影响因子：
5.5
通讯作者：
Sohaib, S. Aslam
中科院分区：
文献类型：
--
作者：
Pankh, Jyoti H.;Barton, Desmond P. J.;Sohaib, S. Aslam
原发性阴道恶性肿瘤非常罕见，仅占所有妇科恶性肿瘤的1%-2%。鳞状细胞癌约占阴道原发恶性肿瘤的85%。此肿瘤典型地发生在阴道上三分之一的后壁。疾病的主要类型是溃烂或真菌肿块或环形狭窄病变。在磁共振成像中，鳞状细胞癌在T2加权像上呈中等信号，在T1加权像上呈低信号。占阴道原发恶性肿瘤的15%的肿瘤是腺癌、黑色素瘤和肉瘤。MR图像上的信号强度特征与组织学亚型相关，并反映了这些组织学亚型在身体其他部位的MR成像表现。继发性阴道癌远比原发阴道癌更为常见。大多数阴道转移瘤是通过宫颈、子宫或直肠的直接局部扩散发生的。这些转移瘤的MRI表现反映了原发肿瘤的MR表现。
Primary vaginal malignancies are rare, accounting for only 1%-2% of all gynecologic malignancies. Squamous cell carcinoma makes up about 85% of primary vaginal malignancies. This tumor characteristically arises from the posterior wall of the upper third of the vagina. The main patterns of disease are an ulcerating or fungating mass or an annular constricting lesion. At magnetic resonance (MR) imaging, squamous cell carcinoma has intermediate signal intensity on T2-weighted images and low signal intensity on T1-weighted images. The tumors that account for the remaining 15% of primary vaginal malignancies are adenocarcinoma, melanoma, and sarcomas. The signal intensity characteristics on MR images correlate with the histologic subtypes and reflect the MR imaging appearances of these histologic subtypes elsewhere in the body. Secondary malignancy of the vagina is far more frequent than primary vaginal malignancy. Most vaginal metastases occur by means of direct local spread from the cervix, uterus, or rectum The MR imaging appearances of these metastases reflect the MR. imaging appearances of the primary tumor.