Are blood clotting disorders hereditary?
Haemophilia
In 1924, a Finnish doctor discovered a hereditary bleeding disorder similar to haemophilia localised in the Åland Islands, southwest of Finland.[41] This bleeding disorder is called "Von Willebrand Disease".
Chronic granulomatous disease
Chronic granulomatous disease (CGD) (also known as Bridges–Good syndrome, chronic granulomatous disorder, and Quie syndrome) is a diverse group of hereditary diseases in which certain cells of the immune system have difficulty forming the reactive oxygen compounds (most importantly the superoxide radical due to defective phagocyte NADPH oxidase) used to kill certain ingested pathogens. This leads to the formation of granulomata in many organs. CGD affects about 1 in 200,000 people in the United States, with about 20 new cases diagnosed each year.