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Kaposi Sarcoma Herpes Virus (KSHV)

By Dr. Sara Dong @swinndong via #IDFellowCase
#ID  #Infectious Diseases  #Infections
#Differential
IDFellowCase #ID #Infectious ... Diseases #Infections ... Diagnosis #KSHV #HHV
Causes of Leukocytosis and Leukopenia - Differential Diagnosis
 • Eosinophilia (AEC > 500, hypereosinophilia > 1500):
Connective Tissue, Infections ... Lymphocytosis: Infection ... Lymphocytopenia: Infections ... • Neutropenia: Infections ... Diagnosis #causes #hematology
Causes of Neutropenia with Pancytopenia - Differential Diagnosis Algorithm
Sequestration:
 • Splenomegaly
Marrow Infiltration:
 • Hematologic and non-hematologic
Infiltration: • Hematologic ... and non-hematologic ... malignancies • Infection ... Algorithm #Causes #Hematology
Clinical Manifestations of Human Herpes Viruses (HHV)

Herpes simplex virus 1	HSV-1	Frequently subclinical (80-90%) Oral lesions (10-20%) congenital
Herpes Viruses (HHV ... 20%) congenital infection ... herpes virus 6 HHV ... herpes virus 7 HHV ... herpesvirus 8 HHV
Hemophagocytic Lymphohistiocytosis (HLH)
Pathophysiology: Triggering factor (infection,...)→Activation of CD8 T cells (IFN-y) → Excessive activation of macrophages
Triggering factor (infection ... Acquired HLH: • Infections ... Virus (EBV, CMV, HHV8 ... Still disease, Infection ... treatment #summary #rheumatology
Thrombocytosis - Differential Diagnosis
Platelet Count > 450
Reactive:
 • Anemia/blood loss (Fe deficiency)
 • Infection/Sepsis
 • Non-infectious
deficiency) • Infection ... Sepsis • Non-infectious ... causes #Platelets #hematology
Causes of Thrombocytosis - Differential Diagnosis Algorithm
Spurious:
 • Artifact (redo CBC)
Autonomous:
 • Essential thrombocytosis
 • Polycythemia
Myelofibrosis Infectious ... Non malignant hematologic ... states • Non-hematologic ... Algorithm #Causes #Hematology
IDSA Aspergillosis Treatment
 • Invasive pulmonary aspergillosis (IPA)
 • CNS aspergillosis
 • Cardiac Aspergillus infection
 •
Cardiac Aspergillus infection ... • Aspergillus infections ... of eye Infectious
Approach to Thrombocytosis - Elevated Platelet Count - Differential Diagnosis Algorithm

Peripheral Smear concerning for malignancy?
→ Refer to hematology ... • Nonmalignant hematologic ... TPO, TPO-RA • Infections ... : Chronic infections ... bacterial and viral infections
Castleman's Disease and Associated Syndromes
HYALINE VASCULAR VARIANT
 • unicentric, HHV8-ve, children and young.
 • Hyalinized vessels
• unicentric, HHV8 ... Plasmablastic subtype is HHV8 ... myeloma, POEMS) HHV8