A benign (not cancer) tumor that is made up of blood vessels and fibrous (connective) tissue. Juvenile nasopharyngeal angiofibromas form in the back of the nose and may spread to the upper part of the throat, the sinuses around the nose, the bone around the eyes, and rarely, to the brain. Signs and symptoms may include runny nose, nosebleeds, problems breathing through the nose, hearing loss, and easy bruising. Juvenile nasopharyngeal angiofibromas are most common in young men. They are a type of vascular tumor.