Small Chyle Leak Localized on Lymphoscintigraphy with Single-Photon Emission Computed Tomography-Computed Tomography

Area of Science:

• Pediatric Medicine
• Diagnostic Imaging
• Thoracic Surgery

Background:

• Chylothorax is the accumulation of chyle, a triglyceride-rich fluid, in the pleural space.
• Spontaneous chylothorax is a rare condition, particularly in infants, requiring accurate diagnosis for effective management.
• Identifying the precise cause of chylothorax is crucial for planning appropriate therapeutic interventions.

Purpose of the Study:

• To describe a case of spontaneous chylothorax in an infant.
• To highlight the utility of advanced imaging techniques in diagnosing the cause of infant chylothorax.
• To emphasize the role of lymphoscintigraphy with SPECT/CT in guiding management decisions.

Main Methods:

• A case study of an infant diagnosed with spontaneous chylothorax.
• Lymphoscintigraphy utilizing 99mTc sulfur colloid was performed to assess tracer distribution.
• Single-photon emission computed tomography/computed tomography (SPECT/CT) was employed for detailed anatomical localization of the lymphatic leak.

Main Results:

• Lymphoscintigraphy demonstrated abnormal tracer accumulation within the thoracic cavity.
• SPECT/CT imaging precisely identified a leak in the thoracic duct at the D8 vertebral level.
• This diagnostic finding was instrumental in understanding the etiology of the infant's chylothorax.

Conclusions:

• Lymphoscintigraphy combined with SPECT/CT is a valuable tool for identifying the cause of chylothorax.
• This imaging modality aids in guiding the management of chylothorax, especially when surgical intervention is considered.
• The case underscores the importance of advanced imaging in diagnosing and managing rare pediatric thoracic conditions.