Ravi Singh K @rav7ks
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Academic Hospitalist and Program Director @SinaiBmoreIMRes, Medicine clerkship director GW School of Medicine and Health Sciences RMC at Sinai, Clinical reasoning,Simulation and POCUS enthusiast - https://twitter.com/rav7ks
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Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
- Idiopathic monoclonal ... - Due to Viral infection ... Polyclonal - Viral Infection ... Check For: • Infections ... hemolytic #anemia #hematology
Venous Thrombosis vs Arterial Thrombosis - Differential Diagnosis Framework

VENOUS THROMBOSIS

 • Acquired Risk Factors:
	- >48 hours
Thrombosis vs Arterial ... Fat Emboli ARTERIAL ... THROMBOSIS Arterial ... in all cases of arterial ... pathophysiology #hematology
Causes of Arterial and Venous Thrombosis - Differential Diagnosis Framework

STRUCTURAL:
 - PFO: paradoxical emboli
 - Popliteal
Causes of Arterial ... aneurysm: Causes arterial ... - TMA: TTP - Arterial ... , HUS, DIC #Arterial ... Diagnosis #clots #hematology
Monoclonal Gammopathy of Undetermined Significance (MGUS) - Summary Framework

Hematologic disorder characterized by the presence of either
Monoclonal Gammopathy ... abnormal intact monoclonal ... : • Serum IgM monoclonal ... MGUS: • Serum monoclonal ... #Significance #hematology
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
: HCV infection, ... HBV infection, ... HIV infection ... Cryoglobulins: - Single monoclonal ... - Composed of monoclonal
Fever Patterns - Differential Diagnosis Framework

Continuous Fever:
Temp > 38°C with only 1 degree fluctuation in 24
• Viral and bacterial ... infections • ... pneumonia • Acute bacterial ... • Acute bacterial ... /years without bacterial
Pustular Skin Lesions - Differential Diagnosis Framework

What are pustules?
• Pustules < 5-10 mm + pus
• Material
10 mm + pus • Material ... fungal, or viral infection ... Dermatophyte infection ... Dermatophyte infection ... Differential #Diagnosis #Dermatology
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
SLE) - Viral infections ... APLS • Acute Infectious ... gangrenosum • Bacterial ... Differential #Diagnosis #hematology ... #nonpalpable #dermatology
Approach to Joint Pain - Diagnostic Framework

1) Chronicity
2) Inflammatory vs Non-Inflammatory
3) Number of Joints Involved

1) Chronicity:
- Think about bacterial ... infections (bacterial ... about indolent infections ... infection, needs ... prosthetic joint infection
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
hypogammaglobulinemia -> increased infection ... history of recurrent infections ... disease • Infectious ... community-acquired infections ... hypogammaglobulinemia #immunology #hematology