The value of lateral renal scans was evaluated in 26 patients with a firm diagnosis of space-occupying lesions in the kidneys. In 14 patients the lateral view provided information additional to the usual P.A. scan. In seven of these 14 patients, the abnormality was shown better on the lateral than on the P.A. SCAN. In the other seven patients, the abnormality had been shown on the P.A. view, but the lateral scintigram provided more precise information concerning the position and size of the lesion.