Snapshot A 68-year-old man presents to his primary care physician with complaints of weakness and fatigue over the past half year. His medical history is significant for poorly-controlled diabetes. His family history is notable for type II diabetes in both of his parents and colon cancer in his father and older brother. A fecal occult blood test is performed and is shown to be positive for blood in the stool. A peripheral blood smear shows the following. Introduction Overview login to view 3 more bullets Epidemiology login to view 12 more bullets Pathophysiology login to view 9 more bullets Presentation Symptoms login to view 3 more bullets Physical exam login to view 5 more bullets Studies Serum labs login to view 11 more bullets Histology login to view 3 more bullets Differential Thalassemia login to view 4 more bullets Sideroblastic anemia login to view 3 more bullets Treatment Lifestyle login to view 3 more bullets