Comparison between malignant and benign abdominal lymph nodes on diffusion-weighted imaging

Area of Science:

• Radiology
• Medical Imaging
• Oncology

Background:

• Diffusion-weighted imaging (DWI) is a valuable MRI technique.
• Apparent diffusion coefficient (ADC) values provide quantitative information about tissue water diffusion.
• Distinguishing benign from malignant abdominal lymph nodes is clinically important.

Purpose of the Study:

• To evaluate apparent diffusion coefficient (ADC) values in benign and metastatic abdominal lymph nodes using diffusion-weighted imaging (DWI).
• To determine if ADC values can differentiate between benign and malignant abdominal lymph nodes.

Main Methods:

• Retrospective analysis of 28 patients with 40 benign and 16 malignant abdominal lymph nodes.
• Abdominal DWI MRI performed with a b-value of 0.600.
• Measurement and comparison of ADC values between benign and malignant lymph node groups.

Main Results:

• Mean ADC value for benign lymph nodes was 2.38 ± 0.29 x 10⁻³ mm²/sec.
• Mean ADC value for malignant lymph nodes was 1.84 ± 0.37 x 10⁻³ mm²/sec.
• A statistically significant difference (P < .0005) was observed between ADC values of benign and malignant lymph nodes.

Conclusions:

• ADC values demonstrate a wide range in metastatic abdominal lymph nodes.
• Benign abdominal lymph nodes generally exhibit higher ADC values compared to malignant ones.
• DWI-derived ADC values show potential for differentiating benign from malignant abdominal lymph nodes.