Cervical Intranodal Lymphangiogram in Pediatrics; Technique, Safety, and Clinical Applications

Area of Science:

• Vascular imaging
• Interventional radiology
• Lymphatic system diagnostics

Background:

• Chylous effusions pose diagnostic challenges, particularly in visualizing central conducting lymphatic ducts.
• Conventional methods like inguinal lymphangiography and magnetic resonance lymphangiography (MRL) may not always achieve thoracic duct opacification.
• Failure to identify the source of chylous leakage can impede effective treatment.

Purpose of the Study:

• To introduce and evaluate a novel cervical lymphangiogram technique for opacifying central conducting ducts.
• To assess the safety and preliminary applications of this new diagnostic and therapeutic approach.
• To address limitations of existing methods in diagnosing complex chylous effusions.

Main Methods:

• A retrospective study included 7 pediatric and adult patients with chylous effusions who failed conservative management.
• Patients underwent magnetic resonance lymphangiogram (MRL) followed by fluoroscopic inguinal intranodal lymphangiogram.
• Cervical intranodal lymphangiogram was performed when inguinal approaches failed to opacify the thoracic duct or effusion source.
• Water-soluble contrast was used due to potential right-to-left shunts.

Main Results:

• The cervical lymphangiogram achieved 100% technical success in opacifying the thoracic duct and identifying the underlying disorder.
• Clinical success, defined by symptom resolution, was 100% in 6 patients who underwent successful glue embolization of leaks.
• No complications related to the cervical lymphangiogram technique were observed.
• Mean follow-up was 150 days, with no recurrences noted.

Conclusions:

• Cervical lymphangiogram is a safe and promising technique for evaluating central conducting ducts.
• It offers a viable alternative when inguinal lymphangiograms (intranodal or MRL) are unsuccessful.
• This method provides a new avenue for diagnosing and potentially treating challenging cases of chylous effusion.