Approximately 60 to 70% of patients with sarcoidosis have characteristic radiologic findings. These patients were isolated and obtained treatment. Radiology Published online April 7, 2020. The CO-RADS classification uses features of COVID-19 on chest CT to indicate the likelihood of COVID-19 pulmonary involvement based on CT imaging (ref Prokop et al). Accessed April 15, 2020. For instance a lobar pneumonia caused by streptococcus pneumoniae may become diffuse if the patient does not respond to the treatment. Student ... Age - Viral pneumonia is most common in the very young and in the elderly. ... European journal of radiology. These diseases typically present as multifocal consolidations, but sometimes they may become diffuse. Acute interstitial pneumonitis (AIP), also known as Hamman-Rich syndrome, is a rapidly progressive non-infectious interstitial lung disease of unknown etiology. The HRCT appearance of pulmonary sarcoidosis varies greatly and is known to mimic many other diffuse infiltrative lung diseases. Viral pneumonia occurs due to aggression of the viral pathogens on the lung structures. 2018 Oct [PubMed PMID: 30292266] Because of the clinical manifestations and the radiologic aspects, viral pneumonia was included in the broad category of atypical pneumonias. Pneumonia is the most common cause of death due to infectious diseases in the United States, with an incidence of 11.6/1000 persons/year reported … Since December 2019, a cluster of cases with unknown pneumonia with similar clinical manifestations suggesting viral pneumonia appeared in Wuhan city, Hubei Province, China. CT has a higher sensitivity but lower specificity and can play a role in the diagnosis and treatment of the disease. Three chest radiologists (F.Song, N.S., and Y.S., with approximately 6–32 years of experience in thoracic imaging, especially in the setting of viral pneumonias such as H1N1 and H7N9 pneumonia) reviewed the images independently, with a final finding reached by consensus when there was a discrepancy. There is a steep decline in the incidence of viral pneumonia from adolescence through the fifth or sixth decade of life. Perihilar “ bat-wing ” consolidation shows central consolidation with sparing of the lung periphery (Figs. Classically, "PCP" was the acronym for Pneumocystis carinii pneumonia, but the causative organism was reclassified as Pneumocystis jiroveci. Terminology. Performance of radiologists in differentiating COVID-19 from viral pneumonia on chest CT. Radiology Published online March 10, 2020. Bai HX, Hsieh B, Xiong Z et al. 2-7 and 2-8).It is most typical of pulmonary edema (hydrostatic or permeability). 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