Ungewöhnlicher Verlauf einer Strahlenpneumonitis mit nachfolgender Bronchiolitis obliterans mit organisierender Pneumonie (BOOP) bei einer Patientin mit Mammakarzinom

: Radiation-induced pneumonitis is a familiar complication of breast cancer radiotherapy, whereas bronchiolitis obliterans with organizing pneumonia occurs extremely rarely after this treatment. Consequently, testing for BOOP is rarely included in differential diagnosis. This results in delayed diagnosis, so that treatment is ultimately commenced too late. The infiltrations are often located in the unirradiated lung, impeding diagnosis. The radiotherapy-induced BOOP-reaction that can also occur after typical radiation pneumonitis is illustrated by reference to a characteristic case report.