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作者报告了3例岩骨尖脊索瘤的CT和MR表现。CT表现为境界清晰的轴外软组织肿块,伴骨质破坏。肿块呈高密度影,其内常有低密度区,与肿瘤内粘液样、胶冻样物质有关。文献记载,如做增强扫描,多有不同程度的强化。3例肿瘤内均有典型的钙化灶,Meyer报告具有钙化灶者仅占47%,其中部分钙化灶可能与骨质破坏的残片有关。其中2例行MR检查,呈典型的长T_1及长T_2,即T_1加权象呈低信号,T_2加权象呈高信号。肿瘤信号不均匀,文献报导约30%的肿瘤内有钙化灶而造成信号缺失。出血灶可使T_1弛豫时间缩短。由于MR多轴位扫描,可清晰地显示肿瘤与邻近血管,尤其是颈
The authors report CT and MR findings of three cases of chordal chordoma. CT showed a clear state of the shaft of soft tissue mass, with bone destruction. Mass was high-density shadow, which often have low-density areas, and tumor mucus-like, jelly-like material. Documentation, such as enhanced scan, there are more different levels of enhancement. In 3 cases, there were typical calcifications in the tumor, Meyer reported only 47% of the calcifications, some of which may be related to bone fragments. Among them, 2 patients underwent MR examination, showing typical long T 1 and long T 2, ie T 1 weighted images showed low signal and T 2 weighted images showed high signal. Tumor signal is not uniform, about 30% reported in the literature of calcification within the tumor caused by signal loss. Hemorrhage can make T_1 relaxation time shortened. Due to MR multi-axial scanning, the tumor and adjacent blood vessels can be clearly displayed, especially the neck