102 video review lessons. Review AP US History by watching and listening to over 18 hours worth of videos carefully coordinated to the AP US History syllabus. 290 AP US History practice questions. Test your understanding of each concept without having to take an entire AP US History practice exam. Customized AP US History study plan.
In fact the most common cause of microcytic anemia is iron deficiency, and in low risk patients physicians often confirm the diagnosis of iron deficiency as the cause by a good response to iron therapy.
Main Cause of Macrocytic Anemia. Macrocytosis should ALWAYS make your doctor do further testing for Vitamin B12 deficiency. These enlarged blood cells are the 'Hallmark Sign' of Vitamin B12 deficiency and should NEVER be overlooked as such- especially in cases where you are experiencing fatigue. In fact, macrocytic anemia is a late sign of vitamin b12 deficiency that occurs only after vitamin b12 deficiency has occurred for over 2 years!!