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).
Symptoms common to many types of anemia include the following: Easy fatigue and loss of energy; Unusually rapid heart beat, particularly with exercise; Shortness of breath and headache, particularly with exercise; Difficulty concentrating; Dizziness; Pale skin; Leg cramps; Insomnia; Other symptoms are associated with specific forms of anemia. Anemia Caused by Iron Deficiency