1350 results
Macrophage Activation Syndrome (MAS)
Classified among the secondary or acquired forms of haemophagocytic lymphohistiocytosis (sHLH)

What?
A subset of
Macrophage Activation ... soluble CD163 • Histopathologic ... bone marrow Histopathologic ... Treatment: • Corticosteroids ... MAS #Macrophage #Activation
Anaphylaxis: Pathogenesis
Anaphylaxis is a Type 1 hypersensitivity reaction
While the primary mechanism of anaphylaxis is mast cell
anaphylaxis is mast cell activation ... Inappropriate mast cell activation ... cells • ANS activation
The parasympathetic and sympathetic systems - Activation and inhibition pathways by organ system

#Sympathetic #Parasympathetic #Systems #Pathways
sympathetic systems - Activation
Fibrinolysis. 
Fibrinolysis occurs when plasminogen is activated to plasmin under the influence of factors such as
tissue plasminogen activator ... thrornbolytic drugs by activating
Transplant Infections Timeline
Pre-transplant:
 • Common bacteria (endogenous): Staphylococci (skin), Gram-negative bacilli (gut)
 • Viruses: HSV (reactivation)
Engraftment:
Viruses: HSV (reactivation ... Viruses: HSV (reactivation ... Viruses: CMV (reactivation ... ), VZV (reactivation ... ), CMV (reactivation
IgA Vasculitis – Henoch Scholein Purpura: Pathogenesis and Clinical Findings

 - Infectious Agents - 50% have
tissue site - Activation ... Leukocytoclastic vasculitis (histopathologic
Hansen's Disease (Leprosy)
 • Transmission - not completely understood, ?nasal droplets
 • Symptoms appear ~5 years
chemotherapy, SOT, HIV) Histopathologic ... and numerous AFB Treatment ... diagnosis #management #treatment
Tranexamic Acid - Indications and Pharmacology
Pharmacokinetics:
 • MOA: Inhibits plasminogen activation to plasmin & inhibits fibrinolysis
Inhibits plasminogen activation ... reduces complement activation
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 ... Unknown cause Treatment ... diagnosis #management #treatment
Gastric Intestinal Metaplasia (GIM)
 • GIM is a precancerous, histopathologic change characterized by replacement of normal
precancerous, histopathologic