Two cases of immunoblastic lymphadenopathy associated with pulmonary infiltration were presented. These had lymphadenopathy, hepatomegaly, rash, dysproteinemia, constitutional symptoms, and typical morphologic findings of lymph node obliteration by immunoblasts and plasma cells, proliferation of arborizing vessels, and infiltration with amorphous, eosinophilic material.
Concerning the radiological findings of these cases, case 1 showed bilateral interstitial infiltrate and case 2 demonstrated lymphadenopathy and pleural effusion, and both were histologically clarified as interstitial pneumonitis with diffuse interstitial cellular infiltration.
