Position dependent renogram changes of the mobile kidney.

The present study evaluates the isotope renograms, obtained in prone and upright position of 87 patients with 93 mobile kidneys. Scintiphotos were made to determine the extent of renal movement. The transient position abnormality of the kidney was compared to the position dependent isotope renogram changes. It was possible to describe three types of floating kidney each with a characteristic motion and position dependent function disturbance. One form of renal ptosis, ptosis with ventral rotation, was commonly associated with a 2nd phase renogram abnormality and with hypertension.