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題名 | Accuracy of Computed Tomography in Staging the Tumor Invasion Status of Colon Cancer=電腦斷層影像在大腸癌術前腫瘤侵犯分期的準確度 |
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作者 | 劉綺霞; 王彥人; 麥志輝; 曾文盛; 吳仁宏; | 書刊名 | Journal of Radiological Science |
卷期 | 37:2 2012.06[民101.06] |
頁次 | 頁51-57 |
分類號 | 416.245 |
關鍵詞 | 大腸癌; 腫瘤侵犯程度; 電腦斷層影像; 準確度; |
語文 | 英文(English) |
英文摘要 | In 2010, the Radiological Society of the Republic of China (RSROC) published a standard image report form for colorectal cancer staging, which included a new image-based classification system for categorizing tumor invasion in colorectal cancer. The aim of this study was to assess the accuracy of computed tomography (CT) with axial and reconstructed coronal images in detecting the tumor invasion status of colon cancer. We retrospectively analyzed data from 154 patients with colon cancer who underwent a preoperative 64-slice multi-detected computed tomography (MDCT) with axial and reconstructed coronal images of the whole abdomen. Rectal cancers were excluded. All CT images in this study were randomly allocated to be read by one of three senior abdominal radiologists. We staged each colon tumor in the CT image using the RSROC’s image classification for tumor invasion status, and compared the results with the histopathology. The tumor thickness in the CT was also evaluated and compared with histopathology. The overall accuracy for the tumor staging was 91 of 154 (59.1%). Accuracy for each T stage was as follows: pT0–Tis, 50% (2 of 4); pT1–T2, 31.8% (14 of 44); pT3, 75.5% (74 of 98); and, pT4, 12.5% (1 of 8). Overall accuracy improved to 70.8%, if we redefined the tumors as < pT2, pT3, and pT4. The tumor thickness, as evaluated by CT and pathology, had a strong positive correlation, with a Spearman correlation coefficient of 0.72. Up to 38.6% of the pT1–T2 tumors could not be identified by CT and were under-staged as cTx (tumor cannot be visualized in this imaging study). Identifying the visceral peritoneum of the colon by CT in order to differentiate between T3 and T4 remains difficult. |
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