The radiology of tumours of the pelvis.

The radiology of tumours involving the bony pelvis was reviewed in 35 patients. In all of the patients computed tomography (CT) and plain radiography had been done and histological confirmation of the diagnosis obtained. In 12 patients radio-isotope skeletal scanning had been done also. CT was invaluable for demonstrating the intraosseous extent of tumours and for giving additional information about the adjacent soft tissue involvement. In some cases, lesions distant from the primary site of interest were displayed on CT. This was particularly valuable where there were lymph node deposits or multiple skeletal deposits. In one case unsuspected hydro-nephrosis was shown. The cause of false positive results in the sacrum was also studied.