The incidence of Pneumocystis carinii pneumonia (PCP) in immunocomprOMised patients is on the increase. We describe two patients with Hodgkin's disease who were proved to have P. carinii pneumonia by toluidene blue "O" (TBO) staining of their induced sputa. To the best of our knowledge, there are no reports from our country regarding P. carinii infection in patients with malignancy.