Non-Resolving Pneumonias: Etiologies Unusual Infections: - Immunocompromised patients (e.g.: Mycobacterium, Aspergillosis, Nocardia) - Endemic Fungi (e.g.: Histoplasmosis, blastomycosis, coccidioides). - Zoonotic (e.g.: tularemia/rabbits, chlamydia psittaci/avian, leptospirosis or yersinia/rats, Q fever/farm) - Returning travelers (e.g.: Burkholderia pseudomallei, hanta virus,.. ) Neoplasms: - Bronchogenic Carcinoma. - Lymphoma. Immunologic disorders: - Vasculitis (granulomatosis with polyangiitis, microscopic polyangiitis). - Eosinophilic PNA (acute or chronic). - Sarcoidosis. - Cryptogenic organizing PNA. - Alveolar proteinosis. - Hypersensitivity pneumonitis - Other Rheum (RA, SLE, ...) Others: - Pulmonary vascular abnormalities (Pulmonary infarction/PE, CHF) - Drug toxicity (Amio, bleomycin, MTX,..) BCM IM Residency @BCM_InternalMed #NonResolving #Pneumonia #diagnosis #pulmonary #differential
