Roy C, Morel M, Saussine C, Vetter J M, Rimmelin A, Jacqmin D, Bourjat P
Service de Radiologie A, Centre Hospitalier Universitaire, Hôpital Central, Strasbourg.
J Radiol. 1993 Mar;74(3):171-8.
We have studied the normal and pathological aspects of seminal vesicles by MRI with body coil by correlation between imaging and pathologic findings after radical surgery of 63 patients with urogenital carcinoma. On normal T2 weighted sequence, the ampulla of the was deferens visible in 71% of cases exhibited a nodular low signal intensity. Seminal vesicles demonstrated an hypersignal in 79%, a low signal intensity in 19% and an heterogeneous signal intensity in 2%. Overall accuracy for the diagnosis of invasion was 77%. MRI was not efficient for bladder carcinoma (sensitivity: 1; specificity: 82%) but it was always gross infiltration (superior to 5 mm) than for prostatic carcinoma (sensitivity: 40%; specificity: 67%). The numerous false positives (15 cases) were related to hypointense normal (8 cases) or fibrous (6 cases) seminal vesicles and one case of atrophy. The false negatives were related to small invasion. Only, the negative predictive value was good value (overall NPV: 96%; bladder carcinoma NPV: 1; prostatic carcinoma NPV: 89%). A normal bilateral hypersignal of seminal vesicles permit to eliminate a gross invasion.
我们通过体线圈磁共振成像（MRI），对63例泌尿生殖系统癌患者根治性手术后的影像与病理结果进行相关性研究，分析了精囊的正常及病理情况。在正常T2加权序列上，71%的病例可见输精管壶腹呈现结节状低信号强度。精囊在79%的病例中表现为高信号，19%为低信号强度，2%为信号强度不均匀。诊断侵犯的总体准确率为77%。MRI对膀胱癌诊断效率不高（敏感性：1；特异性：82%），但对于前列腺癌，其总是显示为明显浸润（超过5毫米）（敏感性：40%；特异性：67%）。大量假阳性（15例）与正常低信号（8例）或纤维化（6例）精囊以及1例萎缩有关。假阴性与微小侵犯有关。仅阴性预测值具有良好价值（总体阴性预测值：96%；膀胱癌阴性预测值：1；前列腺癌阴性预测值：89%）。双侧精囊正常高信号可排除明显侵犯。
