Nishimura K, Kita Y, Arai Y, Oishi K, Okada K, Yoshida O, Nishimura K, Kakano Y
Department of Urology, Faculty of Medicine, Kyoto University.
Hinyokika Kiyo. 1988 Dec;34(12):2083-9.
Twenty-three pathologically revealed prostatic cancer patients were examined by magnetic resonance imaging (MRI), computed tomography (CT) and transrectal ultrasonography, (US) and 6 of them underwent radical prostatectomy. A localized prostatic cancer was identified as a low intensity area in the outer zone with high intensity or showed a partial or total destruction of the border line between the internal and the outer zone when cancer invaded into the internal zone from the outer zone, on T2 weighted image of MRI, as we have already reported. On US, a localized prostatic cancer was identified as a hypoehoic area in the outer zone, and showed a heterogeneous image when cancer enlarged. On CT, a localized cancer could not be identified. A diagnostic criteria for local staging by MRI was made and preoperative staging were done in 6 total prostatectomy cases. The accuracy of preoperative staging of cancer seemed to be the highest by MRI, because it was more accurate in diagnosing the extracapsular invasion, seminal vesicle invasion and bladder neck invasion of the tumor than by CT and US.
对23例经病理证实的前列腺癌患者进行了磁共振成像（MRI）、计算机断层扫描（CT）和经直肠超声检查（US），其中6例接受了前列腺根治术。如我们之前所报道，在MRI的T2加权图像上，局限性前列腺癌在外周带表现为低强度区域且强度较高，或者当癌从外周带侵入内周带时，内外周带之间的边界线出现部分或全部破坏。在超声检查中，局限性前列腺癌在外周带被识别为低回声区，当癌增大时表现为不均匀图像。在CT上，无法识别局限性癌。制定了MRI局部分期的诊断标准，并对6例前列腺全切病例进行了术前分期。癌术前分期的准确性似乎以MRI最高，因为它在诊断肿瘤的包膜外侵犯、精囊侵犯和膀胱颈侵犯方面比CT和超声更准确。
