Lymphocytic Interstitial Pneumonitis

  • Etiology: lymphoproliferative response to human immunodeficiency virus / Ebstein Barr virus
  • CXR: diffuse, symmetrical, reticulonodular or nodular infiltrate with or without hilar + mediastinal adenopathy, nodules are 2-3 mm in size at bases + periphery
  • Complications: bronchiectasis, cysts, bacterial superinfection
  • Clinical: Steroid responsive, in perinatally infected HIV babies 30-40% get LIP

Cases of Lymphocytic Interstitial Pneumonitis

CXR of lymphocytic interstitial pneumonitis / LIP
CXR AP shows bilaterally diffuse, symmetrical, nodular infiltrates.