The EMI whole body scanner in the demonstration of lymph node enlargement.

Thirty-three cases with malignant disease due mainly to lymphoma and testicular tumours were evaluated by computerised tomography (CT) scanning on the EMI general purpose scanner. In many cases there were either more lymph nodes demonstrated than on lymphography or more disease shown in bone or the thorax than was suspected. CT scanning is particularly valuable in showing mesenteric, retrosternal, axillary and para-aortic lymph node enlargement. Bone, liver and pulmonary metastases were shown when not demonstrated by other methods as well as showing the extent of recurrence of malignant disease. In testicular tumours metastatic spread to paravertebral soft tissues behind the diaphragm was clearly demonstrated. This cannot be seen on lymphography. CT scanning appears to be the most accurate method to date of showing the extent of malignant disease, particularly in cases of lymphoma and testicular tumours.