12 results
Diagnosis and Management of Hypocomplementemic Urticarial Vasculitis (HUV)

Diagnosis of HUV
1) Chronic urticaria 
2) Leukocytoclastic vasculitis 
3)
Management of Hypocomplementemic ... vasculitis 3) Hypocomplementemia ... TerrierBen #Hypocomplementemic
Pathophysiology of Hypocomplementemic Urticarial Vasculitis

C1q/anti-C1q antibiody ->
Immune Complex Formation - Complement Pathway Activation (C3a and C5a)
Pathophysiology of Hypocomplementemic ... TerrierBen #Hypocomplementemic
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... @AnnKumfer #Hypocomplementemia
IgG4-Related Disease
Clinical history:  Man, 60 years, multiorgan involvement, unique or multiple inflammatory pseudotumor
4 phenotypes:
 •
pseudotumor 4 phenotypes ... rheumatoid factor), ± hypocomplementemia ... diagnosis #management #phenotypes
COPD phenotypes:  Blue Bloaters vs. Pink Puffers
The two most stereotypical forms of COPD are pink
COPD phenotypes: ... stereotypical forms of COPD ... overlap syndrome of COPD ... #Diagnosis #COPD ... BlueBloaters #Comparison #Phenotypes
Chronic Hypercapnic Respiratory Failure Phenotypes
Pink Puffers (robust vent drive) ↑ their WOB when pulmonary mechanics gradually
Respiratory Failure Phenotypes ... Respiratory #Failure #Phenotypes ... #COPD #diagnosis
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia
Patterns of disease in advanced COPD

Type A: 
Pink Puffer (Emphysema Predominant) 
Major complaint is dyspnea, often
disease in advanced COPD ... #COPD #Patterns ... #Phenotypes #PinkPuffer
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Elevated AST ALT • Hypocomplementemia ... Vasculitis) • Hypocomplementemic
Red Blood Cell (RBC) Morphology
Microcytic RBC: Pyridoxine deficiency, Thalassemia, Iron deficiency anemia, Chronic disease anemia (sometimes),
McLeod blood group phenotype ... Cell Agglutinate: Cold ... anemia, Paroxysmal cold