[The bony scan at 99m Tc pyrophosphate in the chronic kidney deficiency treated by hemodialysis (author's transl)].

The bony scan at 99m Tc pyrophosphate of thirty chronic hemodialyzed patients have been classified in four groups of increasing fixation according to Olgaard's criterions. The clinical, radiological symptoms of renal osteodystrophy the alkalin phosphatases and the PTHi rate have been compared. Twenty-six scans show a noticeable fixation (stage II) or an important one (stage III--eleven patients). The third stage patients have more important radiographical symptoms, a more important rate of alkalin phosphatases and PTHi rate than those of the second stage. According to our observations and those of literature, the scan at 99m Tc PP allow an early and faithful diagnosis of renal osteodystrophy. It seems to represent the increase of the osteoid immature tissue, which is the usual characteristic of the renal osteodystrophy.