Chronic subdural non traumatic hematoma associated with von Willebrand's disease: A real clinical association or just a mere coincidence?

After the first case described [1] came to our attention, we found two other cases: is there a true correlation between CSDH and vWD or is it a mere coincidence? Since all of our cases were O positive, we suggest that a work up for vWD should be made before performing extensive and often unnecessary invasive radiological imaging (i.e. angiogram), which is almost always negative for vascular malformations.