Blood tests that measure vitamin B12 levels are used to diagnose the pernicious form of this
These 
include: Complete blood count: This test measures vitamin B-12 and iron... [DOC] [TLE] Megaloblastic Anemia: Causes, Symptoms & Diagnosis - Healthline [PAR] Sep 30, 2016 ... Megaloblastic anemia is a type of anemia, a blood disorder in which the ...