Li Peng, Liu Jun
Department of Imaging, Tianjin Union Medicine Centre (Nankai University Affiliated Hospital), Tianjin, People's Republic of China.
Melanoma Res. 2016 Feb;26(1):46-50. doi: 10.1097/CMR.0000000000000198.
Here, we report 12 cases of anorectal malignant melanoma (ARMM), which has a very rare incidence. Patients were examined by either computed tomography or MRI or computed tomography combined with MRI before they underwent a remission operation. Because of the paramagnetic contribution from melanin, the short T(1) and short T(2) signals in MRI were specific to melanoma. MRI is reliable in the early diagnosis of ARMM, which is confirmed by pathological reports. Therefore, we advocate the application of a radiological screen using MRI for those patients with a mole in the anorectal region and abnormal colonoscopy findings.
在此，我们报告12例肛管直肠恶性黑色素瘤（ARMM），其发病率极低。患者在接受根治性手术前接受了计算机断层扫描（CT）或磁共振成像（MRI）或CT与MRI联合检查。由于黑色素的顺磁作用，MRI中的短T(1)和短T(2)信号是黑色素瘤的特异性表现。MRI对ARMM的早期诊断可靠，病理报告证实了这一点。因此，我们主张对那些肛管直肠区域有痣且结肠镜检查结果异常的患者应用MRI进行影像学筛查。
