Pulmonary Metastases of Chondroblastoma in a Pediatric Patient: A Case Report and Review of Literature.

Chondroblastoma is a locally destructive, cartilaginous bone tumor that accounts for a small percentage of cases of primary bone tumors. Although considered a benign tumor, chondroblastoma can locally recur and can rarely metastasize. Here, we report a rare presentation of a locally recurrent chondroblastoma with pulmonary metastases. A 13-year-old female presented with palpitations, dry cough, difficulty breathing, and chest tightness four years after her original surgical resection of tibial chondroblastoma. On chest CT, multiple pulmonary soft tissue nodules with confluent punctate areas of calcification were seen. The patient underwent robotic-assisted bilateral pulmonary wedge resections. She is now undergoing denosumab therapy. This case underlined the importance of suspecting metastatic disease in patients with a history of chondroblastoma when pulmonary nodules are detected on imaging.