Clinical Scorecard: Evaluating the Diagnostic Utility of High-Frame-Rate Contrast-Enhanced Ultrasound and a Nomogram for Lymphoma Assessment

At a Glance

Key Highlights

• H-CEUS provides enhanced temporal resolution over conventional CEUS, allowing detailed assessment of lymph node microvascular perfusion.
• Lymphoma often presents as painless lymph node enlargement with nonspecific early symptoms, necessitating accurate imaging for diagnosis and prognosis.
• Four CEUS perfusion patterns (types I-IV) and enhancement degrees (homogeneous vs heterogeneous) assist in characterizing lymph node pathology.

Guideline-Based Recommendations

Diagnosis

• Use B-mode ultrasound and CEUS to evaluate lymph node size, morphology, margins, cortical echogenicity, hilum presence, calcification, and blood flow.
• Perform H-CEUS to capture dynamic microcirculatory perfusion over 60 seconds after contrast injection for improved diagnostic accuracy.
• Classify lymph node perfusion patterns into four types (I-IV) and assess enhancement homogeneity to differentiate benign from malignant nodes.

Management

• Select lymph nodes suitable for biopsy based on ultrasound and CEUS findings to confirm pathological diagnosis.
• Avoid treatment or experimental therapy before imaging and biopsy to ensure diagnostic accuracy.

Monitoring & Follow-up

• Maintain consistent imaging parameters during CEUS examinations.
• Allow at least 20 minutes between H-CEUS and conventional CEUS to ensure microbubble clearance.

Risks

• Poor image quality may limit diagnostic utility; exclude patients with inadequate ultrasound or CEUS images.
• Lymphadenopathy from other malignant hematological diseases should be excluded to avoid diagnostic confusion.

Patient & Prescribing Data

Adults with superficially enlarged lymph nodes undergoing ultrasound-guided biopsy or surgical resection

SonoVue® microbubble contrast agent administered intravenously at 2.4 ml dose followed by saline flush enables enhanced ultrasound imaging of lymph node vascularity

Clinical Best Practices

• Ensure patient positioning allows full exposure of the lymph node examination site.
• Select lymph nodes with appropriate size and location for both CEUS imaging and biopsy.
• Use a standardized ultrasound system and probe settings (e.g., Mindray Eagus R9 with L9-3U probe, mechanical index 0.06–0.08).
• Record comprehensive ultrasound features including size, morphology, margins, cortical echogenicity, hilum status, calcification, and blood flow before CEUS.
• Perform dynamic imaging for 60 seconds post contrast injection to capture arterial phase perfusion details.
• Classify enhancement patterns and degrees systematically to aid differential diagnosis.

References

• Lymphoma overview and epidemiology
• EFSUMB Guidelines for CEUS in superficial lymph nodes
• SonoVue contrast agent information