12 results
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
cellular antigen, leading ... to complement activation ... Complement activation ... Hypersensitivity #Types #Classification ... Diagnosis #Reactions #Table
Hemophagocytic Lymphohistiocytosis (HLH)
Pathophysiology: Triggering factor (infection,...)→Activation of CD8 T cells (IFN-y) → Excessive activation of macrophages
Activation of CD8 ... IFN-y) → Excessive activation ... , Hb), Hepatic dysfunction ... Unknown cause Treatment ... #summary #rheumatology
Macrophage Activation Syndrome (MAS)
Classified among the secondary or acquired forms of haemophagocytic lymphohistiocytosis (sHLH)

What?
A subset of
Macrophage Activation ... IL-1 and IL-6, leading ... nervous system (CNS) dysfunction ... Treatment: • Corticosteroids ... MAS #Macrophage #Activation
Lymphomas and Lymphoproliferative Disorders - Differential Diagnosis Algorithm
Hodgkin Lymphoma ~40% - Characteristic For Reed-Sternberg (RS) Cells
Differential Diagnosis Algorithm ... Responsive to Treatment ... Lymphoproliferative #Disorders #Classification ... pathophysiology #Hematology ... #differential #algorithm
TRALI vs TACO - Transfusion Reactions
TRALI:
 • Epidemiology: 0.1% of transfused patientsl
 • Risk factors: Critical
sequestration and activation ... : 33% • Treatment ... : No • Treatment ... Transfusion #Reactions #hematology ... diagnosis #comparison #table
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Summary table of ... cell antigens, leading ... to complement activation ... types #allergy #table ... #classification
Hemophagocytic Lymphohistiocytosis (HLH)
Definition: Overwhelming clinical syndrome associated with excessive macrophage activation and cytokine storm due to
excessive macrophage activation ... genetic immune dysfunction ... • Bicytopenia Treatment ... diagnosis #management #treatment ... #hematology
Chronic Hepatitis B - Diagnosis and Management Algorithm

• Who to treat: Essentially treat the pts with
and Management Algorithm ... absent the risk of reactivation ... HepatitisB #HBV #Algorithm ... Diagnosis #Management #Treatment ... #Hepatology
Hepatorenal Syndrome (HRS)

Definition:
• Functional, potentially reversible kidney impairment.
• Occurs in advanced liver disease: cirrhosis, severe alcoholic
sympathetic + ADH activation ... Classification: ... Treatment Overview ... Hepatorenal #Syndrome #Hepatology
Hemophagocytic Lymphohistiocytosis (HLH)

High mortality without prompt recognition and management. HLH is a critical diagnostic consideration in
cytopenias and organ dysfunction ... by uncontrolled activation ... MAS-HLH: Macrophage Activation ... uncontrolled immune activation ... Diagnosis #Management #Hematology