306 results
Vitamin B12 (Cobalamin) Deficiency
Etiology:
 • Vit B12 - aka cobalamin. Present in foods derived from animal
) Deficiency Etiology ... : • Vit B12 - aka ... • Common Causes ... level (< 200 pg ... #Cobalamin #Deficiency
Causes of Vitamin B12 Deficiency - Cobalamin
Decreased Intake
Pancreas: Insufficiency
Intestine: SIBO, Celiac disease, IBD, Lymphoma, Amyloidosis, Resection,
Causes of Vitamin ... B12 Deficiency ... pylori infection, B12 ... #Deficiency #Cobalamin ... differential #diagnosis #causes
Diagnosing Vitamin B12 and/or Folate Deficiency

It turns out that simply measuring serum levels of B12 or
and/or Folate Deficiency ... to diagnosis deficiency ... levels will be deficient ... deficiency. ... deficiency.
Causes of B12 deficiency. 

This great diagram shows normal absorption and outlines most possible causes. At
Causes of B12 deficiency ... most possible causes ... At the top is a B12 ... -deficient diet. ... The vitamin B12
Methylmalonic Acid and Homocysteine Levels in Vitamin B12 and Folate Deficiency
 • B12 Deficiency: MMA elevated,
Levels in Vitamin B12 ... and Folate Deficiency ... • B12 Deficiency ... #Homocysteine #B12 ... #MMA #folate #deficiency
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Causes of Thrombocytopenia ... Megakaryopoiesis • B12 ... Deficiency • ... Folate Deficiency ... Diagnosis #Algorithm #Causes
Algorithm for the evaluation of macrocytic anemia. (RBC = red blood cell; MMA = methylmalonic acid.)
Physicians
and a vitamin B12 ... the most likely cause ... recovery also causes ... deficiency is present ... deficiency.
Causes of Neutropenia with Pancytopenia - Differential Diagnosis Algorithm
Sequestration:
 • Splenomegaly
Marrow Infiltration:
 • Hematologic and non-hematologic
Causes of Neutropenia ... Myelodysplasia Nutritional deficiency ... : • B12/folate ... Diagnosis #Algorithm #Causes
Causes of Anemia by Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Low Mean Corpuscular Volume (<80
Causes of Anemia ... (>100 fL) • B12 ... Deficiency • ... Folate Deficiency ... Diagnosis #Algorithm #Causes
Causes of Anemia with elevated Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Normal Blood Smear
 •
Causes of Anemia ... • Dietary Deficiency ... - Low Serum B12 ... and Folate Deficiency ... Diagnosis #Algorithm #Causes