摘要
目的本文通过对22例经手术病理证实的非皮肤性恶性黑色素瘤病例的CT、MRI、乳腺钼靶影像作回顾性分析,结合文献,探讨其影像学表现。方法 22例患者中作MRI平扫及增强扫描11例,CT平扫及增强扫描9例,乳腺钼靶照片2例。结果病灶常呈单个肿块状或结节状,并有明显强化,部分累及邻近淋巴结;病灶的MRI信号呈多样性改变。36.4%病灶(4/11)为T1高信号和T1低信号;18.2%病灶(2/11)为T1低信号和T1高信号;45.5%病灶(5/11)为T1和T1都呈等信号。结论非皮肤性恶性黑色素瘤与皮肤性黑色素瘤有明显不同的表现,临床诊断困难,病灶大都具有侵袭性;如在MRI征象中,病灶内出现T1WI典型的高信号或混杂的高信号时,提示本病的可能性。
Objective The purpose of this study was to review CT,MRI and mamograph features of noncutaneous malignant melanoma（NMM） in 22 patients which were con- firmed by operation and pathological findings. We evaluated the radiologic representations of NMM and reviewed the correlative literatures. Methods Of the 22 NMM patients, 11 patients were taken in MRI scan ,9 patients were taken in CT scan and 2 patients were taken in mammography. Results The lesions of the NMM can occur in a variety of locations. The shape of the lesions usual presented as a single tumour or nub, which was homogenously enhanced following contrast medium or gadolinium injectionL-and which involved adjacent lymph nodes in some cases.The lesions can have a variety of appearances on MRI images. MRI scan revealed 36.4 % lesions （4/11 ） which showed high signal intensity on Tl-weighted images and low signal intensity on T2-weighted images. 18.2 % lesions （2/11） which showed low signal intensity on T 1-weighted images and high signal intensity on T2-weighted images, and 45.5 % lesions （5/11 ） which showed intermediate intensity both on T1-weighted images and on T2-weighted images. Conclusion Noncutaneous malignant melanoma was distinct from cutaneous melanoma, and the clinical diagnosis of NMM was much difficulty. The majority of which lesions was aggressive. It showed the impossible ofnoncutaneous nlalignant melanoma if the focus presented typical or promiscuous hyperintense on T1- weighted images in MRI scan.
出处
《中国CT和MRI杂志》
2012年第4期101-105,共5页
Chinese Journal of CT and MRI
