Blue rubber bleb nevus syndrome is a rare disorder that consists mainly of abnormal blood vessels affecting the skin or internal organs – usually the gastrointestinal tract.[1] The disease is characterized by the presence of fluid-filled blisters (blebs) as visible, circumscribed, chronic lesions (nevi).
BRBNS is caused by somatic mutations in the TEK (TIE2) gene.[2] It was described by William Bennett Bean in 1958.[3]