Calcified Pulmonary Metastases from Chondrosarcoma Mimicking Bone Metastases

摘要

A large variety of sarcomas can produce calcified or ossified pulmonary metastases. Of these, the best known is osteogenic sarcoma. The authors report an unusual example in which calcified pulmonary metastases from chondrosarcoma were shown to concentrate Tc-99m methylene diphosphonate (MDP), mimicking costal metastasis. The SPECT/CT images demonstrate radiotracer accumulation in right upper lung with calcification. Careful attention to calcified pulmonary metastases is important in order to avoid misinterpretation in neoplasms previously reported to produce calcified pulmonary metastases.