Blue rubber bleb nevus syndrome: A European multicenter cohort study

Area of Science:

• Vascular Malformations
• Genetics
• Clinical Medicine

Background:

• Blue Rubber Bleb Nevus Syndrome (BRBNS) is a rare congenital vascular disorder.
• Characterized by cutaneous and gastrointestinal venous malformations.
• Limited research exists on BRBNS, necessitating further investigation.

Purpose of the Study:

• To evaluate current clinical features of BRBNS.
• To assess diagnostic work-up for BRBNS.
• To examine therapeutic management strategies for BRBNS.

Main Methods:

• A multicenter European cohort study.
• Involved 44 patients with BRBNS.
• Collected data on demographics, clinical presentation, and management.

Main Results:

• BRBNS diagnosed at a median age of 12 years, primarily via clinical presentation.
• Commonly presents with cutaneous (68.2%) and digestive (79.5%) lesions, especially in the colon and small bowel.
• Gastrointestinal bleeding (54.3%) is the most frequent complication, often requiring endoscopic treatment.

Conclusions:

• This study represents the largest cohort on BRBNS to date.
• Diagnosis relies heavily on clinical presentation.
• Recommends d-dimer, fibrinogen, and Tie2/TEK mutation testing to aid in suspected BRBNS diagnosis.