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Lung nodules can also occur in immune disorders, such as rheumatoid arthritis or granulomatosis with polyangiitis, or organizing pneumonia. A solitary lung nodule can be found to be an arteriovenous malformation, a hematoma or an infarction zone. It may also be caused by bronchial atresia, sequestration, an inhaled foreign body or pleural plaque.
Lung transplantation to replace the damaged lung tissue is the most effective treatment, but is associated with severe risks of its own from the lung transplant surgery as well as from consequences of long-term immunosuppression (e.g., opportunistic infections).
Coccidioidomycosis is a common cause of community-acquired pneumonia in the endemic areas of the United States. [4] Infections usually occur due to inhalation of the arthroconidial spores after soil disruption. [4] The disease is not contagious. [4] In some cases the infection may recur or become chronic.
The nodules coalesce early in the course of disease, such that the nodules may only be seen as soft fluffy edges in the periphery. [1] When the nodules are centered on the hilar regions, the chest x-ray may develop what is called the "butterfly," or "batwing" appearance. The nodules may also have a segmental or lobar distribution.
Viral infections almost never cause lung cavities; in a small study of immunocompromised patients with a lung infection, the presence of a cavity on CT scan essentially ruled out viral infection. In the same study, about one-third of the cavities were caused by a bacterial infection, another third were caused by a mycobacterial infection, and ...
Lung symptoms in a patient who is taking a medicinal drug that can cause pulmonary toxicity should not automatically lead to a diagnosis of "pulmonary toxicity due to the medicinal drug", because some patients can have another (i.e., simultaneous) lung disease, e.g. an infection of the lungs not related to the medicinal drugs the patient is ...
It is possible that, following an initial tuberculosis infection resulting in bacteremia, a foci of granulomatous inflammation may coalesce into a caseous tuberculoma. [20] Pulmonary tuberculomas may arise due to repeated cycles of necrosis and re-encapsulation of foci, or, alternatively, the shrinkage and fusion of encapsulated densities.
The species Blastomyces percursus causes many cases of blastomycosis in Africa and the Middle East. [14] In Africa, blastomycosis may also be caused by Blastomyces emzantsi, which is often associated with infections outside the lungs. [22] In endemic areas, Blastomyces dermatitidis lives in soil and rotten wood near lakes and rivers. Although ...