We present a case report of a middle-aged man who developed spontaneous pneumomediastinum and pneumothorax after performing spirometry. The patient was evaluated in post-COVID-19 outpatient hospital 70 days after his initial hospitalization for severe COVID-19 pneumonia. After performing forced expiratory maneuver on spirometry, high-resolution computed tomography (HRCT) showed a small right-sided pneumothorax and pneumomediastinum along the bronchi, large blood vessels, and cardiac contour with ‘ground-glass’ opacifications in all lung lobes. The patient was cardiopulmonary compensated and conservative treatment was recommended. The long-term consequences of COVID-19 pneumonia are still not suffi ciently known. Spontaneous pneumomediastinum can very rarely occur as a complication during regular investigation of lung function caused by forced expiratory maneuver on spirometry. Due to lung parenchymal damage, pneumomediastinum with or without pneumothorax in post-COVID-19 patients occurring after spirometry can be expected as a rare but possible complication.Spontani pneumomedijastinum (SPM) je rijetka komplikacija plućnih bolesti. U ovom prikazu bolesnika opisan je bolesnik koji je 70 dana nakon hospitalizacije zbog teške pneumonije COVID-19 nakon izvođenja spirometrije dobio spontani pneumomedijastinum i pneumotoraks. Na HRCT-u (CT toraksa visoke rezolucije) prsnog koša nakon spirometrije bio je vidljiv manji desnostrani pneumotoraks te pneumomedijastinum uz uzorak takozvanog \u27mliječnog stakla\u27 u svim plućnim režnjevima. Budući da je bolesnik bio kardiopulmonalno kompenziran, preporučen je konzervativni pristup i daljnje praćenje. Budući da su dugoročne posljedice pneumonije COVID-19 još uvijek nedovoljno poznate, učinci infekcije na respiracijski te druge organske sustave pratit će se u idućim godinama. SPM može nastati kao vrlo rijetka komplikacija redovnog ispitivanja plućne funkcije spirometrijom tijekom koje se provodi forsirani ekspirij. S obzirom na oštećenje plućnog parenhima uzrokovano pneumonijom COVID-19, Pneumomedijastinum se može očekivati kao moguća, iako rijetka komplikacija nakon provođenja spirometrije u razdoblju bolesti \u27post-COVID-19\u27
