Vitamin B12 Deficiency Physiopedia Two cases of vitamin B12 deficiency in patients with beta thalassemia trait: lessons in diagnosis Bulletin of the National Research Centre Springer Nature Link Full article: A Case of Pernicious Anemia with Concurrent Beta Thalassemia Minor Thalassemia: High Yield Notes Inherited microcytic anemia ( globin chain production) severity varies from trait (mild) to major (severe) Key Concept Microcytosis from reduced hemoglobin synthesis Trait often mild asymptomatic;