-In skeletal tumors, metastatic bone tumors have the most common occurrence [1] and primary bone tumors of chest wall accounts for only 5 - 8 % of all bony tumors. -Of these approximately 95% occur in ribs and remainder in the sternum.

Reference :- https://www.fortunejournals.com/articles/expansile-lytic-lesions-of-rib-two-rare-case-reports.html