As is seen in this patient, the sphenoid sinus may extend beyond the body of the sphenoid bone to pneumatize or involve the adjacent regions. In this case, a lateral recess has been formed within the greater wing of the sphenoid sinus.
1 In general, there are three major types of anemia, classified according to the size of the red blood cells:  If the red blood cells are smaller than normal, this is called microcytic anemia. The major causes of this type are iron deficiency (low level iron) anemia and thalassemia (inherited disorders of hemoglobin).
Iron-deficiency anemia is the most common type of anemia and occurs when the body does not have enough iron. The body needs iron to produce hemoglobin. Iron-deficiency anemia is the most common type of anemia and occurs when the body does not have enough iron. The body needs iron to produce hemoglobin. Newsletter