论文部分内容阅读
目的探讨乳头状肾细胞癌的影像学特点,以提高其诊断符合率。方法利用16排螺旋CT和MRI,回顾性复习25例手术病理证实的乳头状肾细胞癌的CT、MRI表现,对肿块的边界、大小、均匀度及强化度等因素进行分析。结果 25例乳头状肾细胞癌平扫期密度较均匀,增强后强化程度较低。核磁肿瘤信号均匀或不均匀;呈混杂信号、中低信;呈轻中度强化;实性肿瘤为不均匀强化或均匀轻度强化。结论乳头状肾细胞癌体积小时一般密度均匀、边界光整,增强后强化程度较肾实质明显偏低,但也可出现体积较大、强化明显、囊变坏死或周边侵犯及转移等表现。CT、MRI表现为平扫肿瘤密度/信号较均匀,内有灶状出血坏死和钙化,增强扫描肿瘤呈较均匀或不均匀强化。CT和MRI对乳头状肾癌的早期诊断帮助很大,尤其是16排螺旋CT,对乳头状肾细胞癌的诊断准确性较高。
Objective To investigate the imaging features of papillary renal cell carcinoma in order to improve its diagnosis coincidence rate. Methods The CT and MRI findings of 25 cases of papillary renal cell carcinoma confirmed by surgery and pathology were retrospectively analyzed by 16-slice spiral CT and MRI. The boundary, size, uniformity and enhancement of the tumor were analyzed. Results The density of 25 cases of papillary renal cell carcinoma was more uniform during the scan, and the intensity of enhancement was lower. Nuclear magnetic tumor signal is uniform or uneven; was mixed signal, in the low-letter; was mild to moderate enhancement; solid tumor heterogeneous enhancement or uniform mild enhancement. Conclusions Papillary renal cell carcinoma is generally uniform in volume and borderline. The enhanced degree of papillary renal cell carcinoma is obviously lower than that of renal parenchyma, but it may also appear to be larger, more obvious, cystic necrosis or peripheral invasion and metastasis. CT, MRI showed tumor density scan / signal more uniform, with focal hemorrhage and necrosis and calcification, enhanced scan tumors were more uniform or uneven enhancement. CT and MRI are helpful for the early diagnosis of papillary renal cell carcinoma, especially 16-slice spiral CT, which has a higher diagnostic accuracy for papillary renal cell carcinoma.