<unk>  is a form of hemolytic anemia due to<unk> ly induced damage to red blood cells. Red blood cells, while flexible, may in some circumstances succumb to physical shear and compression. This may result in hemoglobinuria. The damage is induced through repetitive<unk>  motions such as prolonged marching (march hemoglobinuria), marathon running, and bongo drumming.<unk>  damage can also be induced through the chronic condition microangiopathic hemolytic anemia or due to prosthetic heart valves.
Mechanical hemolytic anemia
Drug induced hemolytic anemia
Warm autoimmune hemolytic anemia
Immune hemolytic anemia
Non immune hemolytic anemia
Hemolysis 
Polycythemia pathophysiology
Myelofibrosis risk factors