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Abstract #1316

Diffusion-Weighted Magnetic Resonance Imaging of Nasopharngeal Carcinoma

Devin Kwan Ying Fong1, Ann Dorothy King1, Francis KH Lee1, Queenie Chan2, David Ka Wai Yeung3

1The Department of Diagnostic Radiology & Organ Imaging, The Chinese University of Hong Kong, Shatin, Hong Kong; 2Philips Medical Systems, Wanchai, Hong Kong; 3The Department of Clinical Oncology, The Chinese University of Hong Kong, Shatin, Hong Kong

Diffusion weighted imaging (DWI) is a useful technique in the characterization of head and neck lesions and recent have shown that DWI may aid the differentiation between benign and malignant cervical nodes. We examined 57 patients to further document water diffusion in nasopharyngeal carcinoma, a commonly occurring cancer in South-East Asia, by measuring the ADC of primary tumours and malignant nodes. The mean ADC for the primary tumours was 0.9840.16110-3 mm 2/sec and for the malignant nodes was 0.8520.11710--3 mm 2/sec. There was a statistically significantly difference (p.≤0.0001) in the ADC values between primary tumours and malignant nodes