[Inflammatory pseudotumor of the lung. Apropos of a case]

A case of inflammatory pseudotumor of the lung is reported and the essential features are recalled. Depending on morphology or pathogenesis this disease has received various designations, e.g. xanthogranuloma or post-inflammatory tumor. When not found accidentally this relatively rare lesion involves few very specific symptoms and usually occurs in young people. Radiographic and endoscopic investigations are only exceptionally of help in specifying the nature of the disease, and only histology provides any diagnostic certitude. The treatment for this lesion, the prognosis of which is excellent, is surgical.