Magnetic resonance imaging is appropriate for determining the osteotomy plane for XXXX after neoadjuvant chemotherapy.

@entity1 @entity421 @entity5 @entity2996
There are no standard criteria for determining a sufficient resection margin in the treatment of @entity421 . The purposes of this study are to evaluate clinical outcomes using T1-weighted @entity2996 ( @entity2996 ) for determining the margin of resection and to compare that with the results of different imaging modalities. Seventeen @entity1 diagnosed with @entity421 who underwent en bloc resection with a margin of 2-3 cm based on T1-weighted @entity2996 following chemotherapy were studied. Imaging modalities including conventional radiography, @entity2996 , computed tomography (CT), visual assessment, and histopathological examination were performed and compared. Survival rates were determined. After follow-up of 45.5    13.8 months, no local @entity5 recurrence was observed in any @entity1 . The 1-, 3-, and 5-year survival rates were 94.1, 82.3, and 76.5%, respectively. The differences in the measurement errors among the five methods were analyzed using pathology as the gold standard. Errors were smallest using T1-weighted and fat-suppressed @entity2996 . There were no significant differences between the measurement results of postoperative histopathological examination and that of T1-weighted imaging or T2 fat-suppressed imaging. The measurement results of radiography and CT were significantly different from that of postoperative pathological findings (P < 0.05). Thus, @entity2996 examination is superior to radiography and CT for determining @entity5 invasion in @entity1 with @entity421 . A resection margin of 2-3 cm determined by @entity2996 provides adequate treatment, while minimizing tissue removal.
