{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T15:34:14Z","timestamp":1764603254390},"reference-count":17,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2014,5,15]],"date-time":"2014-05-15T00:00:00Z","timestamp":1400112000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clinical Respiratory J"],"published-print":{"date-parts":[[2015,10]]},"abstract":"Abstract<\/jats:title>Background and Aims<\/jats:title>Round pneumonia (RP<\/jats:styled-content>) is a rare radiological presentation of a subtype of lobar pneumonia that arises because of a developmental defect in connective tissues (pores of K<\/jats:styled-content>\u00f6hn and channels of L<\/jats:styled-content>ambert). The round appearance on chest X<\/jats:styled-content>\u2010ray (CXR<\/jats:styled-content>) is thought to occur from an infectious process that spreads from small peripheral alveoli centrifugally through interalveolar channels via the pores of K<\/jats:styled-content>ohn and the canals of L<\/jats:styled-content>ambert. This explains the nonsegmental distribution and shape of RP<\/jats:styled-content>. The pathogenesis of RP<\/jats:styled-content> is unknown. An alternative theory holds that RP<\/jats:styled-content> in children occurs because of underdeveloped pores of K<\/jats:styled-content>ohn and the absence of canals of L<\/jats:styled-content>ambert, limiting the spread of the organism and resulting in a focal, round mass seen on radiographs. As a result of this developmental defect, dissemination of infection remains in a limited area. While this is a well\u2010known entity in childhood, it has been described infrequently in adults. Lesions of RP<\/jats:styled-content> are not necessarily round; oval lesions can also be seen. It is a radiological subtype of the pneumonia subtype and presents as a solitary nodule or a mass lesion in CXR<\/jats:styled-content>.<\/jats:p><\/jats:sec>Methods<\/jats:title>We presented two cases of RP<\/jats:styled-content>. One mimicked and was mistaken for pulmonary infarction because of triangular pleural\u2010based density and the other mimicked pulmonary malignancy because of a homogeneous triangular opacity based on the pleura on the posteroanterior radiography and computed tomography.<\/jats:p><\/jats:sec>Conclusion<\/jats:title>These cases were presented because of RP's importance, and RP<\/jats:styled-content> should be considered a part of differential diagnosis of pulmonary infarct and lung tumor.<\/jats:p><\/jats:sec>","DOI":"10.1111\/crj.12137","type":"journal-article","created":{"date-parts":[[2014,4,14]],"date-time":"2014-04-14T07:38:36Z","timestamp":1397461116000},"page":"512-515","source":"Crossref","is-referenced-by-count":3,"title":["Case of round pneumonia: pulmonary infarct and a rare situation that is similar with the lung cancer"],"prefix":"10.1111","volume":"9","author":[{"given":"Dilay","family":"\u00c7imen","sequence":"first","affiliation":[{"name":"Faculty of Medicine Department of Pulmonary Medicine University of Kirikkale Kirikkale Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emel","family":"Bulcun","sequence":"additional","affiliation":[{"name":"Faculty of Medicine Department of Pulmonary Medicine University of Kirikkale Kirikkale Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aydanur","family":"Ekici","sequence":"additional","affiliation":[{"name":"Faculty of Medicine Department of Pulmonary Medicine University of Kirikkale Kirikkale Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u00d6m\u00fcr","family":"G\u00fcng\u00f6r","sequence":"additional","affiliation":[{"name":"Faculty of Medicine Department of Pulmonary Medicine University of Kirikkale Kirikkale Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mehmet","family":"Ekici","sequence":"additional","affiliation":[{"name":"Faculty of Medicine Department of Pulmonary Medicine University of Kirikkale Kirikkale Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2014,5,15]]},"reference":[{"key":"e_1_2_3_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0735-6757(96)90132-1"},{"key":"e_1_2_3_3_1","doi-asserted-by":"publisher","DOI":"10.1378\/chest.124.1.372"},{"key":"e_1_2_3_4_1","first-page":"206","article-title":"Letters to the Editor","volume":"46","author":"Pe\u00f1a JM","year":"2010","journal-title":"Arch Bronconeumol"},{"key":"e_1_2_3_5_1","doi-asserted-by":"publisher","DOI":"10.1148\/106.1.176"},{"key":"e_1_2_3_6_1","first-page":"448","article-title":"Clinical manifestations and chest radiographic and CT findings of round pneumonia in adults","volume":"59","author":"Miyake H","year":"1999","journal-title":"Nippon Igaku Hoshasen Gakkai Zasshi"},{"key":"e_1_2_3_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00247-007-0654-3"},{"key":"e_1_2_3_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0025-7125(05)70391-6"},{"key":"e_1_2_3_9_1","doi-asserted-by":"publisher","DOI":"10.1053\/stcs.2002.33155"},{"key":"e_1_2_3_10_1","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.182.6.1821567"},{"issue":"1188","key":"e_1_2_3_11_1","first-page":"1233","article-title":"Photo quiz. 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