[Pleural involvement caused by contiguity or metastases in primary malignant bone tumors in children].

Pleural location of primary osseous malignant tumors of children are infrequent. They may be secondary from a distant primary osteosarcoma. It is necessary to investigate them via conventional chest X-ray followed by a CT of the thorax. This examination shows the pleural lesion, its limits and calcifications. It must be remembered that this examination doesn't always confirm the pleural location of the lesions, the angle that they subtend is not an accurate guide. Comparison with clinical data is essential in difficult cases.