Algorithms in Medicine @MatthewHoMD
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Matthew Ho, MD PhD https://twitter.com/MatthewHoMD
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Hemolytic Anemias - Differential Diagnosis Algorithm

Signs of anemia and hemolysis:
 • ↓ Haptoglobin
 • ↑ LDH
Hemolytic Anemias ... Differential Diagnosis Algorithm ... Signs of anemia ... Anemias (AIHAs) ... #Diagnosis #Algorithm
Algorithmic Approach to Anemia - Differential Diagnosis Framework by MCV

Microcytic (MCV < 80) "TAILS":
 • Thalassemia
Algorithmic Approach ... to Anemia - Differential ... -100): • Non-hemolytic ... , CKD • Hemolytic ... #MCV #Algorithm
Iron Deficiency Anemia - Differential Diagnosis Algorithm

Labs: Ferritin, iron, transferrin, TIBC, TSAT, sTfR

 • Blood loss:
Iron Deficiency Anemia ... Differential Diagnosis Algorithm ... extravascular) hemolysis ... Iron #Deficiency #Anemia ... Differential #Diagnosis #Algorithm
Approach to Thrombocytosis - Elevated Platelet Count - Differential Diagnosis Algorithm

Peripheral Smear concerning for malignancy?
Differential Diagnosis Algorithm ... blood loss, Acute hemolysis ... , deficiency anemia ... Differential #Diagnosis #Algorithm
Laboratory Testing in Hemolytic Anemia

Intravascular vs Extravascular Hemolysis
Reticulocytes
Unconjugated bilirubin
LDH
Peripheral smear
Haptoglobin
Urine hemosiderin
Urine hemoglobin
Carboxyhemoglobin

#Hemolytic #Anemia #Laboratory #Testing #workup
Laboratory Testing in Hemolytic ... Anemia Intravascular ... Extravascular Hemolysis ... Carboxyhemoglobin #Hemolytic ... #Anemia #Laboratory
Autoimmune Hemolytic Anemia (AIHA) - Differential Diagnosis Table

Warm AIHA (48-70%)
Cold AHA (16-32%)
 • Donath-Landsteiner HA (paroxysmal
Autoimmune Hemolytic ... Anemia (AIHA) - ... #Autoimmune #Hemolytic ... #Anemia #AIHA #
Approach to Hypoproliferative Macrocytic Anemia

 • 812, Folate Deficiency
 • MDS+
 • Hypothyroid
 • Liver Disease
Hypoproliferative Macrocytic Anemia ... #Macrocytic #Anemia ... differential #diagnosis #algorithm
Approach to Leukocytosis - Differential Diagnosis Algorithm

Features of hematologic malignancy:
 • Symptoms: B-symptoms, bruising/bleeding, fatigue/weakness, immunosuppression
Differential Diagnosis Algorithm ... hepatomegaly • Labs: anemia ... Differential #Diagnosis #Algorithm
Hypokalemia - Differential Diagnosis Algorithm

Transcellular Shift:
 • Alkalosis
 • ↑ beta-2 adrenergic simulation 
 • Erythropoiesis
Differential Diagnosis Algorithm ... in pernicious anemia ... Differential #Diagnosis #Algorithm
Pancytopenia - Differential Diagnosis Algorithm
 • 12-13 g/dL,
 • ANC < 1800/uL,
 • platelet < 150,000/uL

Initial
Differential Diagnosis Algorithm ... ↑ Destruction (hemolysis ... Differential #Diagnosis #Algorithm