31 results
Hemophagocytic Lymphohistiocytosis (HLH)
Pathophysiology: Triggering factor (infection,...)→Activation of CD8 T cells (IFN-y) → Excessive activation of macrophages
Phagocytosis of blood ... • Autoimmune diseases ... Drugs, Unknown cause ... Treatment: • ... #summary #rheumatology
Hemophagocytic Lymphohistiocytosis (HLH)
Definition: Overwhelming clinical syndrome associated with excessive macrophage activation and cytokine storm due to
age, however the disease ... can mimic common infections ... • Bicytopenia Treatment ... : • Infection ... #hematology
Approach to Thrombocytosis - Elevated Platelet Count - Differential Diagnosis Algorithm

Peripheral Smear concerning for malignancy?
→ Refer to hematology ... hematologic: Acute blood ... Rebound effect from treatment ... Vasculitides, IBD, Celiac disease ... Diagnosis #Algorithm #hematology
Hemophagocytic Lymphohistiocytosis (HLH) Treatment
Primary HLH:
 - HLH-94 Protocol
    • Dexamethasone
) Treatment Primary ... associated with infection ... or autoimmune disease ... for refractory disease ... #hematology
Causes of Thrombocytosis - Differential Diagnosis Algorithm
Spurious:
 • Artifact (redo CBC)
Autonomous:
 • Essential thrombocytosis
 • Polycythemia
Causes of Thrombocytosis ... Myelofibrosis Infectious ... disorders • Celiac disease ... effect following treatment ... #Hematology
Macrophage Activation Syndrome (MAS)
Classified among the secondary or acquired forms of haemophagocytic lymphohistiocytosis (sHLH)

What?
A subset of
SLE], AOSD) • Infection ... hypersensitivity syndromes • HLH ... Treatment: • Corticosteroids ... Diagnosis #Management #Hematology ... #Rheumatology
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup
History:
 - Prior platelet count, family
procedures - Infection ... plateletcount), peripheral blood ... PT, aPTT(liver disease ... (CVID, WAS), (neurologic ... #Workup #hematology
Eosinophil Disorders Testing Algorithm
INDICATIONS FOR TESTING:
 • Peripheral blood eosinophilia/hypereosinophilia uncovered incidentally during medical evaluation or
• Peripheral blood ... for secondary causes ... drug reaction, infection ... glucocorticoid treatment ... Differential #diagnosis #hematology
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
GPA causes disease ... cell arteritis Infections ... • Fungal infections ... vasculitis (inflamed blood ... rash #diagnosis #rheumatology
Basophilia - Differential Diagnosis Framework

Basophils < 1% of the total white blood cell count
Basophils function similarly
the total white blood ... Colitis and Crohn’s Disease ... Diabetes/DKA Infections ... : • helminth infections ... #hematology #basophils