Findings:
Corresponding to the sonographic finding, there is an expansile destructive lesion centered around the left fifth rib which measures 124 x 95 x 82 mm. There are internal linear bands of calcification. Adjacent rib cortices appear preserved.
No other aggressive appearing osseous lesion is demonstrated. The central airways are clear. There is no pleural or pericardial effusion. There are no suspicious pulmonary nodules.
There is moderate coronary calcification. The great vessels measure within normal limits for technique. No intrathoracic lymph nodes are enlarged by CT criteria. The limited views of the upper abdomen demonstrate no significant abnormality.
Impression:
Expansile lesion centered around the anterior left fifth rib with significant osseous destruction. Significant soft tissue expansion with internal calcifications. This could represent a primary arcomatous lesion or metastatic lesion. There is no CT evidence of nodal disease.