多排螺旋CT对阑尾黏液性囊腺瘤的诊断分析

DIAGNOSIS OF APPENDICEAL MUCINOUS CYSTADENOMA BY MULTIDETECTOR CT

目的：探讨阑尾黏液性囊腺瘤多排螺旋CT（ multidetector CT，MDCT）的特征性表现。方法回顾性分析8例阑尾黏液性囊腺瘤患者MDCT的影像特点。结果8例阑尾黏液性囊腺瘤均位于右下腹盲肠内侧，病变近端与盲肠相通，远端为盲端；阑尾腔明显增宽，大小不一，8例病变任意径线均＞2.5cm；7例病变呈椭圆形或长条状单房状改变，1例病变内可见纤细分隔；8例囊壁薄厚不一，内外壁较光滑，4例壁内可有条形或蛋壳样钙化，囊内组织CT值为13-21Hu，2例阑尾壁不连续伴盆腔假性黏液瘤形成，6例病变周边未见炎症反应。增强扫描囊壁及分隔呈明显强化，囊内组织未见强化。结论 MDCT通过多平面重组技术能够对阑尾黏液性囊腺瘤作出直接准确的诊断。

Objective To discuss the pathognomonic performance of appendiceal mucinous cystadenoma detected by multidetector CT（ MDCT ）. Methods Retrospective analysis was made on MDCT image of eight patients with appendiceal mucinous cystadenoma. Results The appendiceal mucinous cystadenoma in the eight patients was in the right lower quadrant within the caecum,and the near-end of lesion was linked with caecum while the far-end was invisible. Appendiceal lumen was widened in different sizes. Diameter of each lesion in 8 patients was over 2. 5cm. Seven of the lesions showed oval or elongated monolocular change and 1 lesion showed delicate separation. Eight capsule walls were smooth both inside and outside,either thin or thick. Four inner walls had strip-type or eggshell-type calcification. CT value of inner tissues was about 13 to 21Hu,2 discontinuous appendiceal lining were coupled with pseudo-mucotumor in pelvic cavity. No inflammation was detected around 6 lesions,which were not wrapped by omentum and no swelling lymphonodus were detected in mesentery. Cyst walls after contrast enhancement and septums were seen strong enhancement while inner capsule tissues were not seen enhancement. Conclusion Through multiplanar reformation,MDCT could be make a direct and correct diagnosis of appendiceal mucinous cystadenoma.