DOI: 10.36347/sjmcr.2023.v11i04.036

Pages: 558-565

Acute radiation pneumonitis is a rare cause of pneumonitis. The diagnosis is considered in the presence of respiratory symptoms that appear with recent thoracic exposure. We report the case of a 67-year-old patient followed for mediastinal lymphoma who presented an acute pneumonitis when she started her radiotherapy sessions. Two diagnostics were suspected: radiotherapy toxicity or metastatic origin. Acute post-radiation pneumonitis can be very serious if the diagnostic is delayed. The diagnosis of acute post-radiation pneumonitis constitutes a diagnosis of elimination of any pneumonitis with an unfavorable evolution under antibiotic therapy, in the context of semi-recent thoracic radiotherapy.