The Role of the Single Photon Emission Computed Tomography (SPECT) in Detection of Ossific Mediastinal and Pulmonary Metastases

We have read with considerable interest the case report on the scintigraphic detection of ossific mediastinal and pulmonary metastases in osteosarcoma (Brady & Ennis, 1990). Our recently reported experience of two cases of osteosarcoma (Goddard et al, 1990) has been similar. In one case the pulmonary uptake of 99Tcm MDP demonstrated a metastatic deposit from osteosarcoma that had previously been missed by computed tomography (CT). In the other case, however. CT demonstrated more metastases tha scintigraphy.