Conclusion Due to the high contrast resolution of CT, such tumors can be showed clearly, which will improve the understanding and diagnostic level and provide a scientifie basis clinical treatment.

• 结论CT扫描的高密度分辨率，使这类肿瘤得以显示，提高了对这类肿瘤的认识和诊断水平，为临床正确处治提供依据。