“…According to our data and also to reports of other authors [I, 8,11,[19][20][21], peritoneal dialysis is an effective treatment in life-threatening situations in MSUD with markedly increased metabolite levels. It is unfurtunate, however, that the most dangerous metabolites, i.e., leucine and KICA, have unfavourable kinetics not only in renal excretion but also in peritoneal dialysis.…”