Without regular blood donors Sean Johnson would die.
The 55-year-old Rotorua man has Hereditary hemorrhagic telangiectasia (HHT), also known as Osler-Weber-Rendu disease and Osler-Weber-Rendu syndrome.
HHT is an autosomal dominant genetic disorder that leads to abnormal blood vessel formation in the skin, mucous membranes, and often in organs such as the lungs, liver, and brain.
Treatment focuses on reducing bleeding from blood vessel lesions and sometimes surgery or other targeted interventions to remove arteriovenous malformations in organs.
Chronic bleeding often required iron supplements and sometimes blood transfusions.