The authors report 35 cases of bony tumours of the thoracic wall and emphasize:--the necessity of wide removal even in the case of benign tumours to avoid possible relapses;--the use of rigid material which in the case of anterior parietal breaches, is alone able to give satisfactory solidity to the thoracic wall which is essential to ensure satisfactory respiratory mechanics;--the interest of surgery whether or not associated with radiotherapy or chemotherapy.