Terry syndrome is a type of sickle cell anemia. The sickle body consists of three polypeptide chains, one beta chain and two alpha chains. This is a polypeptide of a pathological structure, having an extremely elongated shape. When hemoglobin is formed, it replaces regular alpha globulin, which entails a disruption of hemoglobin function. Deformation of red blood cells occurs. Red blood cells begin to gradually change. Instead of an eight-spiral shape, a hollow ellipse is formed. Due to this, the viscosity of the blood begins to increase and the hematocrit increases. The blood becomes thick and blood clots appear. In patients with cystic fibrosis, it does not manifest itself.