Đặc điểm hình ảnh và giá trị của Mri 3.0T trong chẩn đoán hạch cổ ác tính tại Bệnh viện Ung bướu Đà Nẵng

Imaging characteristics and the value of 3 Tesla magnetic resonance imaging in malignant cervical lymphadenopathy

SUMMARY

Purposes: Describe imaging characteristics and assess value of 3 Tesla magnetic resonance imaging in differentiating benign and malignant cervical nodes.

Materials and methods: There are 96 consecutive patients with cervical nodes were undergone a 3 Tesla magnetic resonance exam from 10/2016 to 9/2017 and compared with histopathological results.

Results: The average age is 55 years old, and male/female=2/1. Loss of the hilar fat, irregular margins, heterogeneous parenchyma on fat-suppressed T2-weighted images were found in malignant and benign lymph nodes were 74.5% and 4.44%, 72.5% and 4.44%, 88.2% and 4.44%. Diagnosis malignant lymph nodes based on the diameter has got the high valuation with p<0.001. Different size criteria for benign and malignant lymph nodes found that a 11.5 mm size cutoff in the short axis diameter achieved Se 76.5%, Sp 95.6%, Acc 85.4%. In the 67 histologically proven malignant lymphadenopathies, the mean apparent diffusion coefficient (ADC) value was 0.926 ± 0.133 mm2/sec. In the 29 pathologically confirmed benign lymph nodes, an average ADC value of 1.367 ± 0.165 mm2/sec was found. For differentiating between benign versus metastatic lymph nodes, morphological criteria displayed Se 80.0%, Sp 80.0%, Acc 85.4% whereas combined use of morphological criteria on nodal architecture and ADCs yielded Se 98%, Sp 82.2%, Acc 90.6%.

Conclusion: 3 Tesla magnetic resonance imaging is a non-invasive effective technique that can provide useful information in diagnosing benign and malignant nodes in the neck.