[Pneumopathies in immunosuppressed children].

Pneumonia in immunodeficient child is a frequent and dramatic event, with a high risk of mortality. Pneumonia requires immediate management. Multiplicity of causes makes diagnosis difficult. Broncho-alveolar lavage must be the first investigation to carry out while waiting for the results of investigations, rapid and efficient treatment is based on probabilistic reasoning which must take the type of immunodeficiency into account. Prophylaxis is still the best way to improve prognosis of pneumonia in immunodeficient children.