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).
Yes. Iron-deficiency anemia is just one type of anemia. Other types of anemia are caused by: 1  Diets lacking in vitamin B12 (or, the body is unable to use, or absorb B12). 2  Diets lacking in folic acid (or, the body is unable to use folic acid).3  Inherited blood disorders.es. Iron-deficiency anemia is just one type of anemia. Other types of anemia are caused by: 1  Diets lacking in vitamin B12 (or, the body is unable to use, or absorb B12). 2  Diets lacking in folic acid (or, the body is unable to use folic acid). 3  Inherited blood disorders.