Autoimmune disorders

Question 1

Anti-___ antibodies are a highly specific marker for RA

Answer 1

Anti-cyclical citrullinated peptide antibodies (anti-CCP antibodies)

Question 2

CXR shows areas of consolidation with cavitation in the middle/lower lobe with multiple thin-walled, gas-filled cysts within the basal lung parenchyma. Pt has hemoptysis and recently had the Flu virus. Dx?

Answer 2

Secondary bacterial pneumonia
(common complication of the flu in elderly & immunocompromised)

CXR → necrotizing pneumonia.
Air-filled cysts in parenchyma → pneumatoceles