Venous thrombosis in children

Area of Science:

• Pediatric Hematology
• Vascular Medicine
• Neurology

Background:

• Venous thromboembolic (VTE) events are increasingly diagnosed in children, both systemically and cerebrally.
• Advances in pediatric critical care have led to improved survival, increasing the incidence of VTE.
• Central venous lines are a primary risk factor for systemic VTE in children over 3 months old.

Purpose of the Study:

• To review the current understanding of pediatric venous thromboembolic events, including systemic VTE and cerebral sinovenous thrombosis (CSVT).
• To highlight diagnostic and treatment challenges and identify areas requiring further clinical research.
• To emphasize the urgent need for well-designed clinical trials in pediatric VTE and CSVT.

Main Methods:

• Review of international registries and existing clinical studies on pediatric systemic VTE.
• Analysis of data from the Canadian Pediatric Ischaemic Stroke Registry for childhood CSVT.
• Identification of diagnostic methods and treatment approaches based on available literature.

Main Results:

• Teenagers represent the largest group of children over 3 months old experiencing VTE, with central venous lines being the most common cause.
• Ultrasound and venography are effective for upper system VTE, but optimal methods for lower system VTE and pulmonary embolism (PE) remain unclear.
• CSVT diagnosis is improving due to better imaging and recognition of subtle symptoms; however, evidence-based diagnostic and treatment guidelines are lacking.

Conclusions:

• There is a growing need for robust clinical trials to establish best practices for diagnosing, treating, and managing pediatric systemic VTE/PE and CSVT.
• Current treatment studies for VTE are limited by small sample sizes and inadequate power.
• Long-term outcomes like post-thrombotic syndrome are reported, underscoring the importance of effective management strategies.