Anemia of unknown origin, Hemoglobin as low as 6.0. Negative endoscopy, negative colonoscopy, negative occult fecal blood. Low iron: 17 Ferritin 980?

Anemia of Chronic Dz. Your elevated ferritin and depressed serum iron suggests an anemia related to chronic disease. This is a perplexing problem to solve without a careful search of your history and what is happening elsewhere in your body. While the endoscopy helps exclude cancer as the chronic disease, defining the setting as ACD first might have negated the urgency for this.