{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T23:53:49Z","timestamp":1768002829298,"version":"3.49.0"},"reference-count":9,"publisher":"BMJ","issue":"10","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2023,9,19]]},"published-print":{"date-parts":[[2023,10]]},"abstract":"<jats:p>A boy in his late adolescence, with no history of airway disease or medication use, presented with acute history of non-exertional chest pain increased on coughing and deep inspiration accompanied by dysphonia and odynophagia in the last 1\u2009day. He had a notable history of viral fever with non-productive cough 2 weeks prior, which resolved spontaneously. Examination revealed stable haemodynamic parameters. Palpable non-tender crepitus was felt in left anterior chest wall, axilla and both sides of the neck. Auscultation revealed Hamman\u2019s sign. ECG showed high voltage complexes and 2-dimensional echocardiogram (2D ECHO) showed normal biventricular function. CXR was evident of subcutaneous emphysema, pneumopericardium and Naclerio\u2019s sign clinching the diagnosis of pneumomediastinum. CT findings were consistent with a diagnosis of Hamman\u2019s syndrome. Patient was admitted for observation and treated with high-flow oxygen. He improved symptomatically and was discharged on the fourth day of admission.<\/jats:p>","DOI":"10.1136\/bcr-2022-253248","type":"journal-article","created":{"date-parts":[[2023,10,5]],"date-time":"2023-10-05T11:55:39Z","timestamp":1696506939000},"page":"e253248","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Hamman\u2019s syndrome \u2013 with audio file recording Hamman\u2019s sign"],"prefix":"10.1136","volume":"16","author":[{"given":"Nitish","family":"Janardhan","sequence":"first","affiliation":[{"name":"Internal Medicine, KS Hegde Medical Academy, Mangaluru, Karnataka, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6821-4043","authenticated-orcid":false,"given":"Nandu","family":"Nair","sequence":"additional","affiliation":[{"name":"Pulmonary Medicine, KS Hegde Medical Academy, Mangaluru, Karnataka, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7812-3508","authenticated-orcid":false,"given":"Nandakishore","family":"Baikunje","sequence":"additional","affiliation":[{"name":"Pulmonary Medicine, KS Hegde Medical Academy, Mangaluru, Karnataka, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1428-4895","authenticated-orcid":false,"given":"Chandramouli","family":"Mandya Thimmaiah","sequence":"additional","affiliation":[{"name":"Pulmonary Medicine, KS Hegde Medical Academy, Mangaluru, Karnataka, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2023,10,5]]},"reference":[{"key":"2025082707460164000_16.10.e253248.1","first-page":"44","article-title":"Spontaneous mediastinal emphysema: Hamman's syndrome","volume":"64","author":"Kostiainen","year":"1975","journal-title":"Ann Chir Gynaecol Fenn"},{"key":"2025082707460164000_16.10.e253248.2","doi-asserted-by":"publisher","DOI":"10.1378\/chest.128.5.3298"},{"key":"2025082707460164000_16.10.e253248.3","doi-asserted-by":"publisher","DOI":"10.1016\/S0196-0644(05)81750-0"},{"key":"2025082707460164000_16.10.e253248.4","doi-asserted-by":"publisher","DOI":"10.1016\/j.surge.2009.10.007"},{"key":"2025082707460164000_16.10.e253248.5","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1007\/s12245-008-0059-6","article-title":"Spontaneous pneumomediastinum","volume":"1","author":"Mohseni","year":"2008","journal-title":"Int J Emerg Med"},{"key":"2025082707460164000_16.10.e253248.6","doi-asserted-by":"crossref","first-page":"433","DOI":"10.1590\/s1806-37562018000000180","article-title":"Hamman's syndrome","volume":"44","author":"Rosinhas","year":"2018","journal-title":"J Bras Pneumol"},{"key":"2025082707460164000_16.10.e253248.7","article-title":"Post-Partum Hamman's syndrome","volume":"14","author":"Gomes","year":"2022","journal-title":"Cureus"},{"key":"2025082707460164000_16.10.e253248.8","first-page":"43","article-title":"Hamman\u2019s syndrome (spontaneous pneumomediastinum)","volume":"27","author":"Santos","year":"2020","journal-title":"Rev Port Cir Cardiotorac Vasc"},{"key":"2025082707460164000_16.10.e253248.9","unstructured":"Light RW . 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Baltimore: Lippincott Williams & Wilkins, 2013."}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2022-253248","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T14:46:10Z","timestamp":1756305970000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2022-253248"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,10]]},"references-count":9,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2023,10,5]]},"published-print":{"date-parts":[[2023,10]]}},"alternative-id":["10.1136\/bcr-2022-253248"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2022-253248","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,10]]}}}