59 results
Causes of Anemia by Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Low Mean Corpuscular Volume (<80
Causes of Anemia ... of Chronic Disease ... of Chronic Disease ... , Chronic Infection ... #Hematology
Causes of Thrombocytosis - Differential Diagnosis Algorithm
Spurious:
 • Artifact (redo CBC)
Autonomous:
 • Essential thrombocytosis
 • Polycythemia
Myelofibrosis Infectious ... disorders • Celiac disease ... effect following treatment ... Iron deficiency anemia ... #Hematology
Diagnostic Framework for Anemia (Morphological Approach - MCV)
Low MCV - <80fL - "Microcytic"
 • Iron deficiency
disease, Acute ... Megaloblastic: Vitamin B12 ... Alcohol use, Liver disease ... differential #diagnosis #causes ... #hematology
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Megakaryopoiesis • Aplastic Anemia ... Megakaryopoiesis • B12 ... Autoimmune • ITP • SLE ... Vasculitis • Infection ... #Hematology
Overall Approach to Anemia - Differential Diagnosis Algorithm

Blood Loss
 • Acute Bleed - Normocytic / Normochromic
Deficiency • B12 ... • Anemia of Chronic ... Disease • Marrow ... Diagnosis #Algorithm #Causes ... #Hematology
Reticulocyte Production Index = (Retic %) x (Hct / 45) / Maturation Factor
The maturation factor is
loss), Vitamin B12 ... kidney disease, ... (e.g. cancer, infection ... G6PD deficiency), Infections ... Production #Index #hematology
Approach to Thrombocytosis - Elevated Platelet Count - Differential Diagnosis Algorithm

Peripheral Smear concerning for malignancy?
→ Refer to hematology ... hemolysis, deficiency anemia ... Rebound effect from treatment ... : Chronic infections ... Diagnosis #Algorithm #hematology
Causes of Fatigue - Differential Diagnosis Algorithm
Endocrine
 • Hypo/Hyperthyroidism
 • Diabetes
 • Pituitary Insufficiency
 • Adrenal
Neoplastic / Hematologic ... • Anemia • ... Malignancy Infectious ... Arthritis • SLE ... Neurologic
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
- Hemolytic anemia ... Splenomegaly - CTD (SLE ... ) - Viral infections ... Associated - SLE ... Differential #Diagnosis #hematology
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup
History:
 - Prior platelet count, family
procedures - Infection ... test, ANA (e.g., SLE ... (CVID, WAS), (neurologic ... changes), high MCV anemia ... #Workup #hematology