Lipoma is defined as a benign tumor consisting of a circumscribed mass of adipose tissue. Intraosseous lipomas represent fewer than 0.08% of all primary bone tumors. We present an unusual case of intraosseous lipoma arising from the left 10th and 11th ribs and extending to the subdiaphragmatic area and abdomen. Lipoma of the rib is an extremely rare disorder presenting diagnostic challenges.