Interstitial lymphangiography: initial clinical experience with a dimeric nonionic contrast agent

Area of Science:

• Radiology
• Vascular Imaging
• Lymphatic System Diagnostics

Background:

• Lymphedema is a chronic condition characterized by fluid accumulation due to lymphatic system dysfunction.
• Accurate assessment of lymphatic morphology is crucial for diagnosing and managing lymphedema.
• Existing imaging techniques may have limitations in visualizing superficial lymphatic vessels.

Purpose of the Study:

• To evaluate the efficacy of interstitial lymphangiography with a novel nonionic dimeric contrast agent for assessing lower extremity lymphatic vessels.
• To compare imaging findings in normal lower extremities versus those with confirmed lymphedema.

Main Methods:

• Interstitial lymphangiography was performed via intradermal injection of 2 mL of a new nonionic dimeric contrast agent.
• Injection was administered into the intradermal interdigital space at a controlled rate of 0.1 mL/min.
• The study included 34 normal lower extremities and 35 with proved lymphedema.

Main Results:

• In normal extremities, homogeneous injection deposits and 1-5 identifiable lymph vessels were observed.
• Contrast agent diffusion into perilymphatic tissue limited routine visualization of inguinal lymph nodes.
• Abnormal interstitial lymphangiography findings were present in all extremities with advanced lymphedema.

Conclusions:

• Interstitial lymphangiography with this new contrast agent enables morphologic assessment of lymphatic vessels.
• The technique facilitates the diagnosis of lymphatic obstructive diseases, particularly lymphedema.
• This method offers a valuable tool for evaluating lymphatic system integrity.