23 results
Petechial/Purpuric Rashes- THE ALGORITHMIC APPROACH 

These rashes can be especially challenging and are
associated with devastating differential
with devastating differential ... presents in thrombocytopenic ... palpable, the differential ... #Diagnosis #Dermatology ... #Differential
Causes of Purpura - Differential Diagnosis
Disruption in Vascular Integrity: 
 • Trauma, Infection, Vasculitis, Drug induced
Causes of Purpura - Differential ... Integrity: • Trauma ... Primary hemostasis: Thrombocytopenia ... BrighamChiefs #Purpura #nonpalpable ... palpable #Causes #Differential
Causes of Purpura - Differential Diagnosis
Non-PalpabIe → Palpable
 • Thrombocytopenia (HIT, ITP/HUS), Coagulation defects (DIC, warfarin
Causes of Purpura - Differential ... → Palpable • Thrombocytopenia ... warfarin necrosis), Trauma ... BrighamChiefs #Purpura #nonpalpable ... palpable #Causes #Differential
Causes of Thrombocytosis - Differential Diagnosis Algorithm
Spurious:
 • Artifact (redo CBC)
Autonomous:
 • Essential thrombocytosis
 • Polycythemia
Thrombocytosis - Differential ... Post-op surgery • Trauma ... following EtOH induced thrombocytopenia ... Iron deficiency anemia ... Algorithm #Causes #Hematology
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
Purpura - Differential ... - Hemolytic anemia ... Solar purpura - Trauma ... rheumatology #palpable #nonpalpable ... #dermatology
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Causes of Thrombocytopenia ... - Differential ... Megakaryopoiesis • Aplastic Anemia ... #Differential # ... Algorithm #Causes #Hematology
Schistocytes - The arrows point to schistocytes which are fragmented red blood cells. Also called schizocytes,
In the right photo ... seen in hemolytic anemias ... microangiopathic hemolytic anemia ... is mechanical trauma ... and thrombotic thrombocytopenic
Red Blood Cell (RBC) Morphology Atlas
 • Microcytic - Iron-deficiency anemia, Thalassemia, Sideroblastic anemia, Lead poisoning
Iron-deficiency anemia ... Sideroblastic anemia ... Thrombotic idiopathic thrombocytopenia ... key #diagnosis #differential ... #hematology
Thrombocytosis - Differential Diagnosis
Platelet Count > 450
Reactive:
 • Anemia/blood loss (Fe deficiency)
 • Infection/Sepsis
 • Non-infectious
Thrombocytosis - Differential ... Reactive: • Anemia ... rheumatologic, trauma ... Thrombocytosis #Differential ... causes #Platelets #hematology
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
• Mechanical Trauma ... microangiopathy: Thrombotic thrombocytopenic ... Extravascular #Causes #differential ... #diagnosis #hematology ... #anemia