[Invasive aspergillosis with an intrapulmonary fungus ball in childhood].

The clinical and radiological findings of invasive aspergillosis in two children with leukemia are reported. The diagnosis of invasive aspergillosis is still a problem. The fungus is only rarely demonstrated by mycological or serological methods. Therefore the radiological demonstration of an intrapulmonary "fungus ball" in the compromised host is of clinical significance, because it is characteristic of invasive aspergillosis.