Research Article
Colorectal Carcinoma: Local Tumor Staging and Assessment of Lymph Node Metastasis by High-Resolution MR Imaging in Surgical Specimens
Table 4
Diagnostic accuracy of high-resolution MR imaging for evaluating lymph node metastasis in colorectal carcinoma.
| | Criterion for lymph node metastasis | Sensitivity | Specificity | Accuracy |
| | Nodal size | | | | | ≥8 mm | 7/32 (22) | 50/50 (100) | 57/82 (70) | | ≥7 mm | 11/32 (34) | 50/50 (100) | 61/82 (74) | | ≥6 mm | 21/32 (66) | 49/50 (98) | 70/82 (85) | | ≥5 mm | 26/32 (81) | 46/50 (92) | 72/82 (88) | | ≥4 mm | 29/32 (91) | 44/50 (88) | 73/82 (89) | | ≥3 mm | 31/32 (97) | 29/50 (58) | 60/82 (73) | | Signal intensity (SI) | | | | | Mixed | 23/32 (72) | 48/50 (96) | 71/82 (87) | | Mixed or iso/low | 32/32 (100) | 44/50 (88) | 76/82 (93) | | Border contour | | | | | Irregular | 29/32 (91) | 47/50 (94) | 76/82 (93) | | Mixed or iso/low SI and irregular border | | | | | 29/32 (91) | 50/50 (100) | 79/82 (96) | | Nodal size ≥4 mm and (mixed or iso/low SI or irregular border) | | | | | 29/32 (91) | 48/50 (96) | 77/82 (94) |
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Note. Values in parentheses are percentages.
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