5859 results
Hemophagocytic Lymphohistiocytosis (HLH)
Clinical Features: Fever, Splenomegaly, Hepatomegaly, Lymphadenopathy, Confusion
Classic lab findings in HLH: ↑↑ ferritin, Anemia,
Lymphohistiocytosis (HLH ... lab findings in HLH ... Criteria for HLH ... consistent with HLH ... EricsMedicalLectures/ #HLH
Hemophagocytic Lymphohistiocytosis (HLH)
Definition: Overwhelming clinical syndrome associated with excessive macrophage activation and cytokine storm due to
Lymphohistiocytosis (HLH ... : HLH signs and ... testing for HLH-associated ... If no response HLH ... TheIDtrivia #HLH
Diagnostic Schema for Hyperferritinemia

Pearl: Diseases associated with extreme elevations: 
1. HLH 
2. Still's disease 
3. Systemic
Diagnostic Schema ... HLH 2. ... #Differential #Diagnosis
Hemophagocytic Lymphohistiocytosis (HLH)
Pathophysiology: Triggering factor (infection,...)→Activation of CD8 T cells (IFN-y) → Excessive activation of macrophages
Lymphohistiocytosis (HLH ... assessment+++ Primary HLH ... • Familial HLH ... XLP) Acquired HLH ... Nicolas Taar #HLH
Conditions Associated With Hyperferritinemia 
DDx of extreme hyperferritinemia >10,000
Not just HLH - in fact, most common
10,000 Not just HLH ... Infection-Fungai - Primary HLH ... - Secondary HLH ... (Babesia) - Diagnosis ... #differential #diagnosis
Pancytopenia - Workup and Differential Diagnosis Algorithm
Consumption Disorders
 1. Autoimmune Mediated Pancytopenia
 2. Splenic Sequestration
Peripheral Destruction
and Differential Diagnosis ... and Screen for HLH ... HLH syndrome 5. ... #Differential #Diagnosis
Pancytopenia - Workup and Differential Diagnosis Algorithm
Consumption Disorders
 1. Autoimmune Mediated Pancytopenia
 2. Splenic Sequestration
Peripheral Destruction
and Differential Diagnosis ... and Screen for HLH ... HLH syndrome 5 ... #Differential #Diagnosis
Pancytopenia - Differential Diagnosis

Congenital Diseases:
• GATA2 deficiency
• Fanconi’s anemia
• Wiskott-Aldrich syndrome
• Ribosomopathy or telomeropathy

Cancer:
• Leukemia
• Lymphoma

Inflammatory
- Differential Diagnosis ... erythematosus • HLH ... #Differential #Diagnosis
Differential Diagnosis for Generalized Lymphadenopathy

Viral
• HIV 
• EBV 
• CMV 
• HBV 
• Dengue 
• Rubella
Differential Diagnosis ... Amyloidosis • HLH ... #Differential #Diagnosis
Hemophagocytic Lymphohistiocytosis (HLH) Diagnostic Criteria - 2004 vs 2009

At least three of the following: 
 -
Lymphohistiocytosis (HLH ... ) Diagnostic Criteria ... @PulmCrit #HLH ... Lymphohistiocytosis #Diagnosis