Posibleng Mga Sanhi para sa Pneumocystis Carinii Pneumonia Pulmonya na sanhi ng Bakterya HIV na Impeksyon Pulmunya Chronic Kidney Insufficiency Non-Hodgkin Lymphoma Rheumatoid Arthritis Sarcoma ng Baga Agranulocytosis Multiple Myeloma Systemic Lupus Erythematosus Granulomatosis na may Polyangiitis Chronic na Lymphocytic Leukemia Mycoplasma Pneumonia Malalang Myelocytic Leukemia Hodgkin Lymphoma Philadelphia Chromosome Positive Chronic Myeloid Leukemia Chronic na Myeloid Leukemia Acquired Immunodeficiency Syndrome Waldenstrom Macroglobulinemia Legionnaires' Disease Common Variable Immunodeficiency Adenosine Deaminase Deficiency Severe Combined Immunodeficiency Wiskott Aldrich Syndrome Kakulangan ng Carnitine Squamous Cell Carcinoma sa Baga Adrenal Cortex Hormone Chemotherapy Opportunistic na Impeksyon Namamanang Angioedema