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Abstract #4979

The Limitation in Predicting Lymph Nodes Stage by Using Magnetic Resonance Imaging on the Criterion of Size with Histopathological Analysis as Reference

Caizhen Feng1, Jin Cheng1, Jing Wu1, Gongwei Wang2, Yingjiang Ye2, and Yi Wang1

1Radiology, People’s Hospital, Peking University, Beijing, People's Republic of China, 2People’s Hospital, Peking University, Beijing, People's Republic of China

In spite of LN status is critical to the prognosis of patients with gastric cancer, MDCT and MRI cannot accurately assess metastatic LNs prior to surgery.In our study, 802 LNs of 30 patients with gastric carcinoma were harvested.during D2 lymphadenectomy. Only 36.7% (295/802) LNs were detected on preoperative MRI.. 31.5% (217/688) LNs (<8mm) were identified as malignant by pathology, whereas, 44.7% (51/114) LNs (≥8mm) were defined as metastatic. Forty-one metastatic LNs (19%, 41/215) with(≦3mm) were found in 7 patients (23.3%, 7/30) and caused N stage upstaging in 3 patients, which could not be detected by MRI.

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