Blue Rubber Bleb Nevus Syndrome
Also known as: Bean Syndrome, BRBNS
Blue Rubber Bleb Nevus Syndrome (BRBNS) is a rare disorder characterized by the presence of multiple, distinctive, bluish-purple, rubbery, cutaneous (skin) lesions known as blebs, along with vascular malformations that can affect various organs, most commonly the gastrointestinal tract. These lesions can cause pain, bleeding, and anemia. The severity and location of the lesions vary greatly among affected individuals.
Imagine you have little blue or purple bumps under your skin, like rubbery blueberries. Sometimes, these bumps can bleed inside your tummy and make you feel tired. Doctors can help by giving you medicine or sometimes removing the bumps.
Signs & Symptoms
- Bluish-purple rubbery skin lesions (blebs)
- Gastrointestinal bleeding
- Iron deficiency anemia
- Abdominal pain
- Visceral lesions (e.g., in the small intestine, liver, or central nervous system)
- Deformed extremities
- Thrombocytopenia
- Intussusception
- Protein losing enteropathy
Treatment Options
Iron supplementation
SUPPORTIVEBlood transfusions
SUPPORTIVEEndoscopic removal or ablation of lesions
MODERATELY EFFECTIVESurgical resection of affected bowel segments
MODERATELY EFFECTIVESirolimus (Rapamycin)
MODERATELY EFFECTIVE Approved 2009Octreotide
MODERATELY EFFECTIVE Approved 1988Propranolol
MODERATELY EFFECTIVE Approved 1976Diagnosis
- Clinical examination
- Skin biopsy
- Endoscopy (colonoscopy, esophagogastroduodenoscopy)
- Capsule endoscopy
- Angiography
- Magnetic Resonance Imaging (MRI)
- Genetic testing (in familial cases)
History
The first detailed description of Blue Rubber Bleb Nevus Syndrome was provided by William Bean in 1958, who characterized the distinctive cutaneous and gastrointestinal manifestations of the disease.
Recent Breakthroughs
Sirolimus Shows Promise in Reducing Bleeding in BRBNS Patients
A study published in the Journal of Pediatric Gastroenterology and Nutrition demonstrated that sirolimus significantly reduced gastrointestinal bleeding and improved anemia in a cohort of BRBNS patients.
Identification of Novel Somatic Mutations in BRBNS
Research published in Human Genetics identified novel somatic mutations in the TEK gene in a subset of BRBNS patients, providing further insight into the genetic etiology of the disease.