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We present the case of a boy, with chronic respiratory insufficiency due to bronchiolitis obliterans, that presented worsening exertional dyspnea at 12 years. Spirometry showed unexpected deterioration of respiratory function and a computed tomography scan revealed an obstructive polypoid mass in the intermediate bronchus. Given the severe basal ventilatory compromise and risk associated with surgical treatment, rigid bronchoscopy, and laser photocoagulation were performed, with clinical and functional improvement. The histological examination revealed a low\u2010grade mucoepidermoid carcinoma. The option for a minimally invasive procedure requires careful follow\u2010up due to the risk of tumor recurrence.<\/jats:p>","DOI":"10.1002\/ppul.25685","type":"journal-article","created":{"date-parts":[[2021,9,28]],"date-time":"2021-09-28T21:56:04Z","timestamp":1632866164000},"page":"4063-4065","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Endobronchial mucoepidermoid carcinoma in a child with postinfectious bronchiolitis obliterans"],"prefix":"10.1002","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8270-767X","authenticated-orcid":false,"given":"Sara","family":"Fonseca","sequence":"first","affiliation":[{"name":"Pediatrics Department Centro Hospitalar Universit\u00e1rio S\u00e3o Jo\u00e3o  Porto 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