75 results
Small Vessel Vasculitides
 • Granulomatosis with polyangiitis - Granulomatous manifestations (e.g., nasal crusting, destructive sinusitis, pulmonary
Small Vessel Vasculitides ... destructive sinusitis, pulmonary ... retroorbital mass) • Microscopic ... Cryoglobulinemic vasculitis ... #vasculitis #differential
Causes of Hemoptysis - Differential Diagnosis Algorithm
Massive Hemoptysis (>I00 mL in 24 hours)
 • Malignancy
 •
of Hemoptysis - Differential ... Vasculitis Infection ... Vasculitis • ... polyangiitis / microscopic ... #Hemoptysis #Differential
Borrelia recurrentis Infection - Spirochetes were visible (arrows), a finding that suggested louseborne relapsing fever #Clinical
fever #Clinical #Pathology ... Recurrentis #Smear #Microscopy ... #NEJM
Excoriated papules with honey-colored crusting were present on the abdomen, back (Panel A), arms, and legs.
mite under light microscopy ... Clinical #Derm #Pathology ... #Scabies #Microscopy ... #Rash #NEJM
Pulmonary Renal Syndrome

Definition: Diffuse alveolar hemorrhage + Glomerulonephritis
Presentation (Pulmonary and renal manifestations can occur weeks apart):
symptomatology Differential ... ANCA-positive vasculitis ... polyangiitis, Microscopic ... ANCA-negative vasculitis ... Renal #Syndrome #differential
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
- Differential ... progressing GN • New pulmonary ... PR3-ANCA): • Microscopic ... Dx: GPA, EGPA, microscopic ... differential #diagnosis
Vasculitis Involving the Skin - Differential Diagnosis Framework

Primary: 50% Cutaneous Vasculitis: Leukocytoclastic Vasculitis
Secondary: CTD: SLE, RA
Vasculitis Involving ... the Skin - Differential ... 50% Cutaneous Vasculitis ... Associated: - Microscopic ... #rheumatology #differential
Dermatological semiology of Cutaneous Vasculitis 

Clinicopathologic correlations
 • Purpura, papules, pustules, necrosis: involvement of small vessels
semiology of Cutaneous Vasculitis ... • Drug-induced vasculitis ... • Necrotizing vasculitis ... manifestations #pathology ... #lesions #differential
More common & convincing pneumonia mimics 

Aspiration pneumonitis, 
Pulmonary vasculitis, 
Acute eosinophilic pneummia,  
Cryptogeric organizing
pneumonitis, Pulmonary ... vasculitis, Acute ... of idiopathic pulmonary ... Pneumonia #Mimics #Differential ... #Diagnosis #Pulmonary
Hemoptysis Differential Diagnosis Framework
Cardiovascular: Pulmonary embolism, Heart failure, Vasculitis, Valvular disease, Arteriovenous malformation
Pulmonary - Airway: Bronchitis,
Hemoptysis Differential ... Cardiovascular: Pulmonary ... Heart failure, Vasculitis ... Arteriovenous malformation Pulmonary ... #Hemoptysis #Differential