Diagnostic Utility of High-Frame-Rate CEUS and Nomogram in Lymphoma Assessment

Overview

This study evaluated the effectiveness of high-frame-rate contrast-enhanced ultrasound (H-CEUS) compared to conventional CEUS (C-CEUS) in diagnosing superficially enlarged lymph nodes and predicting lymphoma aggressiveness. Using pathological results as the gold standard, H-CEUS demonstrated improved temporal resolution and diagnostic accuracy in characterizing lymph node properties.

Background

Lymphoma is a malignant tumor of the lymphatic system often presenting as painless lymph node enlargement. Early diagnosis is challenging due to nonspecific clinical symptoms and overlapping ultrasound features of lymph node pathologies. Conventional ultrasound and color Doppler imaging have limitations in differentiating benign from malignant lymph nodes. Contrast-enhanced ultrasound (CEUS) enhances visualization of microcirculation, but conventional CEUS is limited by rapid perfusion dynamics. High-frame-rate CEUS (H-CEUS) improves temporal resolution, potentially enhancing diagnostic accuracy for superficial lymph nodes.

Data Highlights

A total of 288 patients (143 males, 145 females; mean age 59.9 ± 13.8 years) with superficially enlarged lymph nodes underwent B-mode US, H-CEUS, C-CEUS, and pathological confirmation via biopsy or surgical resection. Contrast agent SonoVue® was administered intravenously, and dynamic imaging was acquired for 60 seconds. Lymph node perfusion patterns were classified into four types (I-IV), and enhancement degree was categorized as homogeneous or heterogeneous.

Key Findings

• H-CEUS provided superior temporal resolution compared to C-CEUS, allowing better visualization of microcirculatory perfusion in lymph nodes.
• Four distinct perfusion patterns were identified on CEUS, aiding differentiation of lymph node pathology.
• H-CEUS improved diagnostic accuracy in distinguishing benign from malignant superficial lymph nodes.
• The study developed a nomogram incorporating clinical and ultrasound features to predict lymphoma risk and aggressiveness.
• Pathological diagnosis via biopsy or surgical resection served as the gold standard for validating imaging findings.

Clinical Implications

H-CEUS can be considered a valuable imaging modality for evaluating superficially enlarged lymph nodes, providing enhanced diagnostic information over conventional CEUS. Incorporating H-CEUS findings with clinical data into a nomogram may assist clinicians in assessing lymphoma risk and guiding biopsy decisions. This approach may improve early diagnosis and treatment planning for patients with suspected lymphoma.

Conclusion

High-frame-rate contrast-enhanced ultrasound enhances the characterization of superficial lymph nodes and, combined with clinical parameters, can effectively predict lymphoma presence and aggressiveness. This technique holds promise for improving diagnostic accuracy and patient management in lymphoma assessment.

References

1. Lymphoma Overview and Epidemiology
2. EFSUMB Guidelines for CEUS in Non-Hepatic Applications
3. High-Frame-Rate CEUS in Lymph Node Diagnosis