👉 Myelomatosis is a hereditary disease that affects the lining of blood vessels, specifically in the brain and spinal cord. It is characterized by the development of clumps or "myelomas" (tumors) of the blood vessels. These tumors can be benign or malignant, with some cases being life-threatening. Myelomatosis is caused by a mutation in the gene that codes for the production of the clotting factor, which is necessary for blood to clot properly. This mutation