M36: Systemic disorders of connective tissue in diseases classified elsewhere

M36.2: Haemophilic arthropathy

Blood is made up of a liquid part and different blood cells, among other things. The blood cells include the red blood cells, the white blood cells and the platelets. Platelets are important for blood clotting. Besides platelets, there are certain proteins that are involved in blood clotting.

When there is a blood coagulation disorder, one or more of these proteins are partly or entirely absent in the blood. It may also be that one or more of these proteins are not working as they normally do. If the blood coagulation is disturbed, you may bleed more quickly or heavily than usual. You may bleed more quickly or heavily even in the case of a minor injury. These small injuries can also cause bleeding in a joint. When blood gets into a joint, the joint can become inflamed. They can also deposit substances from the blood into the joint. The inflammation and the substance deposits can then damage the joint.